Showing Collections: 451 - 500 of 1046
Abstract: The Hendrick Manufacturing Company was the nation's largest manufacturer of perforated screens. This small collection consists of photographs which primarily show exterior views of the plant, and some interior views as well as photographs of the company's products and personnel.
Dates: circa 1900-1977
Abstract: The Hendrick Manufacturing Company was the nation's largest manufacturer of perforated screens. The company was founded by an inventor and entrepreneur, Eli E. Hendrick (1832-1909) in 1885 in Carbondale, Pennsylvania and remained in the hands of Hendrick's descendants until the 1980s, when it was sold. Hendrick's business ventures also included refining lubricating oils and cold storage refridgeration for argricultural produce. This collection consists of records detailing businesses founded by Hendrick and his descendants, including lubricating oil, refrigeration, and metal perforation, especially the Hendrick Manufacturing Company.
Dates: 1861-1980; Majority of material found within 1870-1920
Abstract: The Henry family were armsmakers who operated a family gun manufactory in eastern Pennsylvania for five generations. The records of the Henry family document the line leading from the first William to Granville, with some records of William, III. The main body of records deals with the operation of the Boulton Gun Works, its predecessor operation at Nazareth and the associated gun shop and store in Philadelphia.
Abstract: Henry Hemmendinger was one of the preeminent color scientists of his day. Hemmendinger's papers represent the span of his career and includes contributions from a variety of individuals and organizations working the field of color science.
Dates: 1931-2000, bulk 1960-1985
Abstract: Herny S. Rothrock (1906-1986) was a DuPont research chemist. In 1930, he joined the staff of the Experimental Station of E.I. du Pont de Nemours & Company. He obtained fifty-six patents, chiefly in the field of polymer chemistry and served ten years at liaison manager in the Central Research Department, retiring in 1971. This collection consists primarily of photos relating to DuPont's Experimental Station in Wilmington, Delaware. There are group photos of new employees in the Central Research Department, committees and conferences and press release photos from the 1964 New York World's Fair.
Dates: circa 1920-1968
Overview: Herbert Belar (1901-1997) was an inventor and research scientist in the field of acoustical engineering at the RCA David Sarnoff Research Center in Princeton, New Jersey for thirty-eight years. He developed "hi-fi" recording, the phonetic typewriter, and the electronic music synthesizer. This small collection of Herbert Belar papers reflects the professional daily work of an acoustical engineer from the 1930s through the 1960s. There is significant documentation on the phonetic typewriter, the 200 speech communication system, the music composing machine, and the electronic music synthesizer. Notable inclusions are information related to the development of "hi-fi," film motion pictures sound recording, and phonographic records recording. There is only one file that discusses Belar's work at the MAD Laboratory.
Dates: 1928-2020; Majority of material found within 1938-1966
Abstract: The Hercules Powder Company was one of the companies created from the break up of the E.I. du Pont de Nemours "powder trust" in 1911 as ruled by a U.S. Supreme Court decision. In its early years as a separate company, it continued to produce explosives and dynamite and used advertising styles and devices. This item is a poster depicting a World War I soldier leaving home and telling his hunting dog, "Not this trip Old Pal."
Dates: circa 1917
Abstract: The Hercules Powder Co. was one of companies created from the break up of the E.I. du Pont de Nemours "powder trust" in 1911 as ruled by a U.S. Supreme Court decision. The Laflin and Rand Powder Company, one of the largest gunpowder manufacturers in the nineteenth century, was formed from several predecessor companies, including the Laflin Powder Company and the Smith & Rand Powder Company. This collection consists of a Hercules Powder Company calendar from 1919 and an undated illustration from a company calendar. There are also reproductions of a group of three different display card advertisements for Laflin & Rand Powder Company, probably for point-of-sale or counter display.
Dates: circa 1901-1920
Abstract: Herman Schroeder joined the DuPont Company's Chemical Department in 1938 and held various positions at the Organic Chemistry Department at Jackson Laboratory and the Elastomer Chemicals Department. This collection consists primarily of materials related to Schroeder's professional activities after his retirement from the DuPont Company in 1980.
Abstract: H.E. Schroeder (1915-2009) was a research chemist who spent most of his career with E.I. du Pont de Nemours & Company. His papers consist of documents and memorabilia covering his family and professional life.
Abstract: The Hiebler family papers include documents pertaining to four generations. The bulk of the collection consists of letters written by Alfred I. du Pont to his grandsons Bayard Hiebler and Benno Hiebler, dated 1927 to 1935.
Dates: 1911-1982; Majority of material found within 1927-1935
Abstract: Hill-Chase & Co., also know as the Hill-Chase Steel Company, was formed in February 1929 by Charles H. Chase (1884-1967), John J. Hill, Jr. (1891-1978), and several other employees of Edgar T. Ward Steel Service Center in Philadelphia. The company was well known for its innovations in steel. This is a small collection of copy photographs of the facilities and employees.
Dates: circa 1945-1951; bulk 1945-1951
Abstract: A collection of random files on DuPont Company history and biography removed from the company's downtown headquarters building prior to its move to the suburbs.
Abstract: Kevlar is a synthetic fiber developed by chemists Stephanie Kwolek (1923-2014), Paul Morgan (1911-1992), and Herbert Blades in 1965 while working at the DuPont Company. The oral histories presented here document the research and development processes that transformed Kevlar from a novel polymer in the laboratory to a life-changing product in the marketplace.
Abstract: Founded in 1901, Holeproof Hosiery Company was a Milwaukee, Wisconsin firm that produced men's and women's hosiery, underwear, lingerie and men's pajamas. Carl Freschl (1842-1911) was the founder and his son, Edward Freschl (1877-1930) was the first president of the company. This advertisement brochure for the Holeproof Hosiery Company consists of two Illustrations that show a woman putting on shoes (back) and a woman on the phone (front). The inside contains an a photograph of a woman demonstrating the "extra stretch top" of the stockings.
Dates: circa 1920
Abstract: Hoopes Brothers & Darlington began in West Chester in 1867 manufacturing wooden spokes for wheels. By the eighteen-eighties it was one of the largest wooden wheel makers in the country. Workers at the wooden wheel-making plant of Hoopes Brothers & Darlington, Inc. of West Chester, Pennsylvania, photographed at machinery. Includes portraits of Thomas Hoopes, then head of the company.
Dates: circa 1966
Abstract: Hoopes Brothers & Darlington began in West Chester in 1867 manufacturing wooden spokes for wheels. By the eighteen-eighties it was one of the largest wooden wheel makers in the country. This collection contains photographs which show the steps involved in the making of wooden wheels from the delivery of the logs to the finished project.
Overview: Horace Holden Thayer, Jr. (1878-1959) was a naval architect, mechinical engineer, and businessman. Between 1909 and 1914 Thayer worked for the Delaware Construction Company which was a building company, and a subsidary of the National Real Estate Trust Company, which provided loans and financing for the properties. This small collection consists of papers relating to Thayer's early work with the National Real Estate Trust Company and the Delaware Construction Co. These materials document the formation of the National Real Estate Trust Company and building specifications for the Delaware Construction Co. There is a small amount of papers related to the businesses of his father-in-law Thomas H. Savery (1837-1910), specifically the Harpers Ferry Paper Company and the Shanandeoah Pulp Company.
Abstract: Soap traces its history all the way back to the Babylonians in 2800 BC. However, bar soap only dates back to the late eighteenth century. The use of bar soap became the norm in the mid-nineteenth century. By this time soap could be mass produced and mass marketed. Many of the large bar soap companies were established during this time. This collection consists of 155 hospitality soap wrappers that have been flattened. The soap wrappers generally contain the name of the hotel, city and state, as well as a logo or graphic of some kind. Most wrappers include the brand name and product name, though a few do not have any information about the soap listed on the wrapper. All of the hotels are in the United States, not all of the states are represented in the collection. This collection would be useful for those researching package design, logos, or the soap industry. Potentially the collection also indicates relationships between specific hotel companies and their personal hygiene vendors.
Dates: circa 1930s-1950s
Abstract: Hotel du Pont is a historic hotel located in Wilmington, Delaware that opened in 1913. The Hotel du Pont Company was organized on July 2, 1912, for the purpose of operating a hotel within the Du Pont Building in downtown Wilmington. The Hotel du Pont historical files were collected to assist in the preparation of an Arcadia book by Joanna L. Arat, which was issued to mark the 100th anniversary of the hotel, and include administrative records, marketing and sales information, food services and material related to other special events.
Abstract: Hotel du Pont is a historic hotel located in Wilmington, Delaware that opened in 1913. This collection of Hotel du Pont materials represents publicity materials covering the renovations within the hotel and some of the more special events held there primarily dating from 1980 to 1992.
Dates: 1913-2002; Majority of material found within 1980-1992
Abstract: The Hotel Varadero Internacional, built in 1950, was next to
Xanadu, Irenée du Pont's (1876-1963) estate that was built in Cuba around 1930. The postcard gives a black and white photographic view of the entrance to the driveway to the Hotel Varadero, with the hotel in the background.
Abstract: House Industries is a type foundry in Yorklyn, Delaware which specializes in creating fonts for billboards, greeting cards, logos and a variety of other media. The collection is a set of nine advertising cards promoting House Industries and its United typeface.
Abstract: 170 Breck's Lane was owned by William Winder "Chick” Laird, Jr. (1910-1989) and served as workers' housing. Laird was the director of E. I. du Pont de Nemours and a financial advisor, starting his own brokerage firm in Wilmington, Delaware. This collection contains twenty photographic prints of various interior and exterior architectural views of 170 Breck's Lane before architectural rennovations by the owner.
Dates: circa 1820
Abstract: Elsmere is a town in New Castle County in Delaware. This collection consists of six photographs of miscellaneous houses in Elsmere, which were loaned to the Hagley Museum and Library for copy.
Dates: circa 1900-1920
Overview: Howard Ensign Simmons Jr. (1929-1997) was an industrial scientist and the Research Vice-President in the Central Research Department of the DuPont Company from 1979 until his retirement in 1991. His records document Simmons's role in overseeing the production of "Science and Corporate Stategy" by David A. Hounshell and John K. Smith, a scholarly history of Research and Development at the DuPont Company. Also included are reports on DuPont's diversification program in the late 1960s.
Dates: 1857-1997; Majority of material found within 1960-1990
Abstract: Various employer's association records from the 1990s collected by British historian of United States labor, business, and economic history, Howell Harris, for use in his 2000 book, "Bloodless Victories: The Rise and Fall of the Open Shop in the Philadelphia Metal Trades, 1890-1940." Includes several public relations, recruitment, and general information folders and packets distributed by employers' associations from across the United States.
Abstract: Hudson Maxim (1853-1927) was an inventor and chemist best known for his work in the development of smokeless gunpowder and military explosives. This collection focuses on Maxim's attempt to float his inventions in England during the late 1890s, his anti-pacifist crusade and war-era activities, and his work at Lake Hopatcong.
Abstract: Hudson Maxim (1853-1927) was an inventor and chemist best known for his work in the development of smokeless gunpowder and military explosives. The collection consists primarily of photographs, many of which are portraits, of Hudson Maxim and his family, friends, and associates.
Dates: circa 1890-1925
Abstract: Stewart Huston (1898-1971) began his career as a metallurgist and worked in varying capacities in the family business, Lukens Steel Company, in Coatesville, Pennsylvania, from 1923 until his death. Assembled by Huston, the collection relates to genealogy and family history.
Abstract: International Business Machines Corporation (IBM) became a giant in the field of electronic data processing by the mid-1950s. There are two photographs (one each) of the IBM 650 computer and IBM 305 computer.
Abstract: The Indiana Ordnance Works was built by the DuPont Company for the U.S. Government beginning in 1940. It manufactured military explosives, propellants, and smokeless powder. This collection consists of photographs of the Ballistics Lab of the Indiana Ordnance Works.
Abstract: The Indiana Ordnance Works was built by the DuPont Company for the U.S. Government beginning in 1940. It manufactured military explosives, propellants, and smokeless powder. The panoramic photographs show overviews of the Indiana Ordnance Works facilities, Charlestown, Indiana.
Abstract: The Insurance & Financial Communicators Association (I.F.C.A.) "is an international organization dedicated to the ongoing professional development of its members in life insurance and related financial services communications."  The associations primary objective is to promote the exhange of ideas among its members through educational programs, events, and publications. The primary value of the collection is in its capacity for documenting trends in the marketing of life insurance, and the rationale behind particular advertising campaigns. Case histories and publications aimed at the industry are of most use in this regard. The bulk of the records are of interest only in documenting the internal functions of the organization and the issues which it has perceived as important to the insurance industry.
Abstract: Insurance Society of Philadelphia provided a forum for persons engaged in the fire insurance business. The records consist of two series culled from the society's library: vertical files and scrapbooks. The records document various aspects of the insurance industry, the society and its members.
Abstract: The Intellectual Property Committee (IPC) was formed in 1986 as an ad-hoc coalition comprised of major U.S. corporations, such as IBM, Pfizer, and DuPont, to foster international support to improve and protect patents, trademarks, copyrights, and trade secrets. The Committee's efforts resulted in the 1994 passage of the Trade-Related Aspects of Intellectual Property Rights (TRIPS) Agreement at the Uruguay Round, thus introducing intellectual property law into the international trading system. The records of the IPC include administrative files and correspondence, subject files, committee proposals, meeting agendas and summaries - both domestic and international - as well as reports and publications.
Abstract: The Inter-Society Color Council coordinates the activities of leading technical societies relating to the description, specification, and standardization of color, and promotes the practical application of this knowledge in science, art, and industry. Dorothy Nickerson (1900-1985) worked in the research laboratory of the Munsell Color Company from 1921-1926, and is known for her numerous contributions to the field of color science. This collection consists of materials from the Cooper Hewitt Design Museum.
Abstract: The Inter-Society Color Council Records represents a wide array of individuals and organizations and their contributions to the development of standardized systems for identifying and evaluating color. This collection documents the advancement of color technology in the twentieth century and its practical application to problems related to color in science, art, and industry.
Dates: 1879-2000; Majority of material found within 1895-1985
Abstract: The Transportation Act of 1920 required railroads to file with the Interstate Commerce Commission (ICC) for permission to eliminate tracks from their system. The collections consists of index cards to finance dockets involving the Pennsylvania Railroad, Penn Central Transportation Company, and Conrail.
Abstract: Irene (Renee) Carpenter (1911-1991) was a descendant of Pierre Samuel du Pont de Nemours (1739-1817) who founded the E.I. du Pont de Nemours & Company with his son Eleuthère Irénée du Pont (1771-1834) in 1802. She was the second child of R.R.M. Carpenter (1877-1949) and Margaretta Lammot du Pont (1884-1973) and a granddaughter of Lammot du Pont (1831-1884). The collection consists of photographs of Irene Carpenter Draper, as a child and as a young adult, and her extended family.
Dates: circa 1850-1950
Abstract: Irénée du Pont (1876-1963) was a chemical engineer. He began work for E.I. du Pont de Nemours & Co. in 1903 in the Construction Division of the Black Powder Operating Department. After holding several positions within the company he went on to be the president of the DuPont Company. He served in this capacity from 1919 until 1926. The collection consists of photographs related to Irénée du Pont's family, personal interests, and involvement with organizations such as the Delaware Safety Council.
Dates: circa 1860-1960
Abstract: Xanadu was the name of the opulent Cuban estate of Irenee du Pont (1876-1963). He bought land on the Hicacos Peninsula of Cuba to build the four-story estate. This collection consists of photographs of the exterior and interior of the home near Varadero, Cuba.
Dates: circa 1930; 1997
Abstract: Irv Koons (1922-2017) was a graphic artist, designer, and illustrator who became one of the leading consumer package designers of the twentieth century. The Irv Koons papers include marketing research studies, business correspondence, public relations files, and materials from the designer's packaging courses. In addition to this textual component, the archive contains original artwork, sketches, comprehensives, mock-ups, and final product packaging. These materials document not only the career of Irv Koons, but also the growth and development of the packaging industry in the second half of the twentieth century.
Dates: 1946-1996; Majority of material found within 1955-1985
Overview: Irv Koons (1922-2017) was a graphic artist, designer, and illustrator who became one of the leading consumer package designers of the twentieth century. The photographic collection contains slides, negatives, color transparencies, and prints documenting all of Koons's major design projects over the course of his long career as a package designer.
Abstract: James Crosby Brown, Jr., was born in Hartford, Conn., in 1929 and spent most of his life in Philadelphia, where he pursued a career in business. After retiring in 1981, he turned full-time to his life-long avocation of maritime history. This collection consists of copy photographs of steamboats, many on the Schuylkill River.
Overview: J. Howard Pew (1882-1971) was president of one of the largest wholesale distributor of motor petroleum companies, the Sun Oil Company (now Sunoco) from 1912 to 1947. He was a prominent philanthropist. In 1948, Pew and his siblings co-founded The Pew Charitable Trusts, a non-profit, non-governmental organization with the purpose of serving the public. The J. Howard Pew papers are primarily concerned with Pew's political activities and philanthropy. The collection is arranged into seven series: Alphabetical general correspondence; Subject files; Presbyterian Church; Christian Freedom Foundation; Glenmede Trust Co.; Pew Memorial Foundation; and Grove City College.
Abstract: Capital Airlines was a commercial airline for the eastern, southern, southeastern, and midwestern United States from 1936 to 1961. It was the fifth largest airline in the United States. The airline was the first to offer service from the west to Washington D.C., coach class service, in-flight television, and jet-powered commercial aircraft. This collection includes materials related to Capital Airlines predecessor company, Clifford Ball Airlines, and materials created under its former name, Pennsylvania Central Airlines. There is also materials related to the Capital Airline Association. The collection documents the history of the airlines, its aircraft and employees.
Abstract: The Jackson and Sharp Company, a manufacturer of railroad passenger cars, was incorporated in Delaware on February 24, 1869, as the successor to the partnership of Jackson & Sharp. This collection contains copy photographic prints of the company plant.
Dates: before 1902
Abstract: Jackson Hunsicker (1948-2017) invented the Memo Mate in the mid-1990s. It was a small personal recording device that could store up to twenty seconds of audio. The Memo Mate was marketed as a handy way to remember appointments, phone numbers, directions, and the location of a car in a large parking lot. The Memo Mate was a successful invention, selling close to 10 million units. Hunsicker's papers on the patenting and marketing of Memo Mate document the typical process and pitfalls of patenting and marketing by a lone inventor. The collection consists of the legal correspondence of the patent application process and subsequent contractual disputes, along with schematics and designs, and possible names and logos. Hunsicker’s invention represents a demonstration of the patent process as well as a contribution from a woman inventor to the field.
Abstract: A collection of bulletins and reports from the library of DuPont's Jackson Laboratory. Most were generated by the Organic Chemicals Department, which operated Jackson Laboratory, but others come from other DuPont Departments and their laboratories.
Dates: 1931-1997; bulk 1944-1963
- Audiovisual Collections 669
- Manuscripts and Archives 350
- Published Collections 27
- Advertisements 97
- Railroads 87
- Correspondence 60
- Gunpowder industry 58
- Exhibitions 56
- Chemical industry 52
- Explosives industry 49
- Portraits 37
- Postcards 36
- Aeronautics 35
- Ephemera 34
- Financial statements 34
- Textile industry 34
- Automobile industry and trade 33
- Exhibition buildings 33
- Electronic industries 32
- Group portraits 32
- Steel industry and trade 32
- Photograph albums 30
- Research, Industrial 29
- Panoramic photographs 28
- Wilmington (Del.) 28
- Construction projects 27
- Factories 27
- Railroads -- Rolling stock 26
- Iron industry and trade 24
- Marketing 24
- Testing laboratories 24
- Patents 23
- World War, 1939-1945 23
- Planographic prints 22
- Reports 22
- Textile fibers, Synthetic 22
- Posters 21
- Scrapbooks 21
- Aerial photographs 20
- Coal mines and mining 19
- Industrial design 19
- Ships 19
- Du Pont family -- Homes and haunts 18
- Packaging -- Design 18
- Powder mills 18
- Railroad stations 18
- Steel-works 18
- Weapons industry -- Employees 18
- Chemical plants 17
- Sales promotion 17
- Social history 17
- Blast furnaces 16
- Genealogies 16
- Industrial films 16
- Industrial safety 16
- Iron and steel workers 16
- Minutes 16
- Pennsylvania 16
- Account books 15
- Airplanes 15
- Historic sites 15
- Business and politics 14
- Dyes and dyeing 14
- Finishes and finishing 14
- Gunpowder, Smokeless 14
- Inventors 14
- Papermaking 14
- Television 14
- Trade associations 14
- Computer industry 13
- Gardens 13
- Industrial chemists 13
- Industrial housing 13
- Investments 13
- Oral histories 13
- Philadelphia (Pa.) 13
- World War, 1914-1918 13
- Dwellings 12
- Electric industries 12
- Glass negatives 12
- Industrial buildings 12
- Maps 12
- Steam locomotives 12
- Textile factories 12
- Viewbooks 12
- Anthracite coal industry 11
- Banks and banking 11
- Diaries 11
- Display of merchandise 11
- Household electronics 11
- Hunting 11
- Recreation 11
- Technical drawings 11
- Timetables 11
- Women employees 11
- Biography 10
- Brandywine Creek (Pa. and Del.) 10
- Commerce 10
- Domestic relations 10
- Dynamite 10
- Executives 10
- Interior decoration 10
- Machine shops 10 ∧ less
- English 1037
- French 7
- German 1
- Italian 1
- Spanish; Castilian 1
- E.I. du Pont de Nemours & Company 119
- Unknown 51
- Du Pont family 48
- Vinson, Z. Taylor 28
- Pennsylvania Railroad 26
- RCA Corporation 17
- E.I. du Pont de Nemours & Company. Experimental Station 16
- Dick, John A., 1879-1972 14
- New York World's Fair (1939-1940 : New York, N.Y.) 12
- New York World's Fair (1964-1965 : New York, N.Y.) 11
- Savery, Thomas H., 1837-1910 11
- World’s Columbian Exposition (1893 : Chicago, Ill.) 10
- Du Pont, Pierre S. (Pierre Samuel), 1870-1954 8
- Eleutherian Mills (Greenville, Del. : Estate) 8
- Bethlehem Steel Corporation 7
- Centennial Exhibition (1876 : Philadelphia, Pa.) 7
- E.I. du Pont de Nemours & Company. Chestnut Run Laboratories 7
- E.I. du Pont de Nemours & Company. Textile Fibers Department 7
- Joseph Bancroft & Sons Co 7
- Reading Company 7
- Southeastern Pennsylvania Transportation Authority 7
- Amtrak 6
- Baldwin Locomotive Works 6
- Century of Progress International Exposition (1933-1934 : Chicago, Ill.) 6
- Gentieu, Pierre A., 1842-1930 6
- Greenewalt, Crawford H., 1902-1993 6
- Hagley Museum and Library 6
- International Business Machines Corporation 6
- Jackson Laboratory (E.I. du Pont de Nemours & Company) 6
- Lehigh Valley Railroad Company 6
- Radio Corporation of America 6
- Baltimore and Ohio Railroad Company 5
- Budd Company 5
- Du Pont, Alfred I. (Alfred Irénée), 1864-1935 5
- Du Pont, Eleuthère Irénée, 1771-1834 5
- Du Pont, Irénée, 1876-1963 5
- E.I. du Pont de Nemours & Company. Brandywine Works 5
- E.I. du Pont de Nemours & Company. Carney's Point Works 5
- E.I. du Pont de Nemours & Company. Central Research and Development Department 5
- E.I. du Pont de Nemours & Company. Hagley Yard 5
- E.I. du Pont de Nemours & Company. Pioneering Research Laboratory 5
- General Electric Company 5
- Hagley Museum and Library. Library. Oral History Project Office 5
- Loewy, Raymond, 1893-1986 5
- Louisiana Purchase Exposition (1904 : Saint Louis, Mo.) 5
- Penn Central Transportation Company 5
- Ramsay, William G. (William Gouverneur), 1866 - 1916 5
- Victor Talking Machine Company 5
- American Iron and Steel Institute 4
- American Telephone and Telegraph Company 4
- Bethlehem Steel Company 4
- Brandywine Manufacturers Sunday School 4
- Central Railroad of New Jersey 4
- Du Pont, Richard C. (Richard Chichester), 1911-1943 4
- E.I. du Pont de Nemours & Company. Engineering Department 4
- E.I. du Pont de Nemours & Company. Organic Chemicals Department 4
- E.I. du Pont de Nemours Powder Company 4
- General Motors Corporation 4
- Kwolek, Stephanie, 1923-2014 4
- Lea family 4
- Longwood Gardens (Kennett Square, Pa.) 4
- Lukens Steel Company 4
- National Association of Manufacturers (U.S.) 4
- Philadelphia & Reading Railroad Co 4
- Pusey and Jones Company 4
- Remington Arms Company 4
- Savery, William H., 1865-1949 4
- Sperry Rand (Corporation). Univac Division 4
- University of Delaware 4
- Watson, Robert B. 4
- Aircraft Owners and Pilots Association 3
- All American Engineering Company 3
- American Car and Foundry Company 3
- Avon Products, Inc 3
- Bannerman family 3
- Bannerman's Island Arsenal (Fishkill, N.Y.) 3
- Baughman, James P. 3
- Brandywine Hundred (Del.) 3
- Carothers, Wallace Hume, 1896-1937 3
- Christ Church Christiana Hundred (Greenville, DE) 3
- Christ Church Christiana Hundred Sunday School 3
- Cinecraft Productions, Inc 3
- ConRail 3
- Dallin, J. Victor (John Victor), 1897-1991 3
- David Sarnoff Library 3
- DeMirjian, Charles H., 1925- 3
- Delaware, Lackawanna and Western Railroad Company 3
- Du Pont Motors, Incorporated 3
- Du Pont de Nemours, Pierre Samuel, 1739-1817 3
- Du Pont, Charles I. (Charles Irénée), 1797-1869 3
- Du Pont, Sophie Madeleine, 1810-1888 3
- Du Pont, Victor Marie, 1767-1827 3
- Du Pont, William, 1855-1928 3
- E.I. du Pont de Nemours & Company. Chamber Works 3
- E.I. du Pont de Nemours & Company. Elastomer Chemicals Department 3
- E.I. du Pont de Nemours & Company. Pompton Lakes Works 3
- E.I. du Pont de Nemours & Company. Public Relations Department 3
- E.I. du Pont de Nemours & Company. Repauno Works 3
- Erie City Iron Works 3
- Hanford Engineer Works 3 ∧ less