Bowlus-Du Pont Sailplane, Inc. was a short-lived company which combined the financing of record holding glider pilot, Richard du Pont (1911-1943), and the engineering skills of Hawley Bowlus. This reproduction drawing (there are two copies) includes elevations and cross sections of an Albatross II.

The Delaware Construction Company was a building company, constructing residential houses in downtown Wilmington, Delaware. It was founded in 1909 as a subsidiary of the National Real Estate Trust Company, which provided loans and financing for the properties. This small collection consists of five blueprints of houses by E. Olney Sherman, dated 1910 for Delaware Construction Co.

The Erie City Iron Works in Erie, Pennsylvania, was a major manufacturer of boilers, stationary and portable engines, and machinery for sawmills and steam riveting. The collection consists of technical diagrams of engines.

Frederick William Wood (1857-1943) was an executive and engineer in the steel and shipbuilding industries. His papers constitute a major source on the history of the American steel industry in the late nineteenth and early twentieth centuries. The papers are primarily official records of the various companies with which Wood was associated.

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 consists of blueprint floor plans for eleven cars built between 1901 and 1905, primarily for narrow-gauge lines in Maine.

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. The drawings comprise materials salvaged from the plant. Most are detail drawings of brake rigging or of parts such as couplers, locks, ventilators, and plumbing fixtures. The projects include standard and narrow-gauge railroad cars and streetcars for both foreign and domestic customers. The materials date from 1895 to 1930.

James W. Flaherty Inc. was a general contractor company in Wilmington, Delaware that operated between 1949 and 1983. Consists of drawings and plans for various local properties, including du Pont family estates.

A small sample of engineering sketch sheets from a large Wilmington, Delaware, cotton textile and textile finishing firm.

Joseph T. Richards (1845-1933) was a career civil engineer with the Pennsylvania Railroad Company who participated in several of their large construction projects in the first decade of the twentieth century. The records consist of the contents of a small portfolio of documents relating to the construction of Pennsylvania Station and its associated yards and terminals.

Kenneth A. Browne (1905-1985) was the research director attached to the president of the Chesapeake and Ohio Railway system. This collection consists of his files and documents the history of the development of Train "X" from its beginnings in 1945 to the point at which the New York Central's "Xplorer" was introduced in 1956.

The Marconi Wireless Telegraph Corporation of America was founded in 1899 as the American branch of Guglielmo Marconi’s (1874-1937) Wireless Telegraph & Signal Company of London. Because of its emphasis on providing radio transmitter receivers for ships and fostering oceanic communications, the U.S. Navy commandeered the company during World War I. After the war, both government and industry colluded to buy out the British company; they created the Radio Corporation of America in its stead in 1919. This collection includes around 1,300 engineering and technical drawings from the Marconi Wireless Telegraph Company of America . Subjects depicted range from circuit diagrams, wiring layouts, and switchboard schematics to architectural plans for aerial towers and carrying case designs.

The Mixobeater was a machine developed for the baking and food processing industries by the Meteor Mixing Machine Company and Mixobeater Machinery Company, of New York. The collection pertains mainly to the sale of machine parts and business dealings to Fitchburg Machine Works and include lists of patents, drawings and instructions, and correspondence.

Red Arrow Lines, Inc. was a suburban transit company. This collection contains photographs of Red Arrow Lines transit vehicles and stations that were used in book R. DeGraw, Red Arrow Lines.

Richard Hollerith, Jr. (1926-), spent his professional career working as an industrial designer of office products, computers, printers, office space, and household products. His papers include correspondence, meeting minutes, conference and working group reports, and blueprints reflecting his work as a designer and as an advocate of universal design and barrier-free environments.

Wawaset Park was a planned community, commissioned by the DuPont Company for its company executives. The records describe the park, its residents, and history through corporate records, maps and deeds of the property, lists of corporate officers and residents, as well as histories of the park, the City of Wilmington, and the state of Delaware.

William Liseter Austin (1852-1932) was an executive of the Baldwin Locomotive Works in Philadelphia. Baldwin Locomotive Works was a manufacturer of railroad locomotives from 1825 until 1972. The papers include correspondence, most of which is technical in nature; there is also a vertical file on the construction, sale, and parts of locomotives; specifications; sketches and sketchbooks; and engineering drawings. A very small portion of the collection covers Austin's personal affairs.

The William Pahlmann papers provide a rich insight into the world of interior design in the middle of the twentieth century. Pahlmann (1900-1987) was well known for his use of bold colors, textures and mix of antique and modern furnishings. Stressed in all of his work, were the conventions of comfort and functionality as well as his clients individual tastes. The William Pahlmann Papers are organized into thirty unique series of varying sizes. The papers are organized into correspondence, publicity files, renderings, samples, artifacts, design plans, and client invoices.

The Woodlawn Trustees, Incorporated, is a non-profit real estate development firm incorporated in Delaware on December 12, 1918, by textile manufacturer William Poole Bancroft (1835-1928). Their records include charters, minutes, officer lists, directors' correspondence, real estate records, property maps, reports, drawings and specifications and newspaper and journal articles on the history of the Trustees and of the Bancroft family.