Patents, 1923-1932
Scope and Contents
Patent 1,441,088 - System of Air Control, January 2, 1923
Patent 1,549,420 - Acetylene Torch, August 11, 1925
Patent 1,601,069 - Method of and Apparatus for Assembling Members, September 28, 1926
Patent 1,648,944 - Nut Tightening Apparatus, November 15, 1927
Patent 1,667,006 - Lapping Machine, April 24, 1928
Patent 1,748,983 - Control Instrument, March 4, 1930
Patent 1,749,076 - Apparatus for Assembling Members, March 4, 1930
Patent 1,764,628 - Indicating Apparatus, June 17, 1930
Patent 1,806,202 - Apparatus for Assembling Members, May 19, 1931
Patent 1,813,926 - Clutch and Speed Reducing Mechanism, July 14, 1931
Letter to Professor W. M. Hepburn, Librarian from A. A. Potter, Dean of Engineering, October 10, 1932 [Potter was offering copies of Hofstetter's patents to the library and suggesting a file be started on all alumni patents]
Dates
- Creation: 1923-1932
Creator
- From the Collection: Hofstetter, Robert (Person)
Language of Materials
Collection materials are in English.
Access Information
Collection is open for research.
Extent
From the Collection: 0.025 Cubic Feet (One folder)
Repository Details
Part of the Purdue University Archives and Special Collections Repository
504 Mitch Daniels Boulevard
West Lafayette Indiana 47907 United States
765-494-2839
archives@purdue.edu