Skip to main content
Notice: The Library is open for research by appointment only, please visit our research services page for more information.

Patents

 Subject
Subject Source: Library of Congress Subject Headings

Found in 1 Collection or Record:

Fred C. Ielfield patents

 Collection
Accession: 1043
Abstract:

Fred C. Ielfield (1864-1948) was a mechanical engineer and inventor. This collection consists of twelve patents for mail canceling and postmarking machinery, corn-husking machinery, and a cereal cutter, all invented by Ielfield.

Dates: 1901-1946