By Mary A. Sego
Title: Robert Hofstetter papers, 1923-1932
Primary Creator: Hofstetter, Robert
Extent: 1.0 Folders. More info below.
Arrangement: Chronological
Subjects: Purdue University--Alumni and alumnae
Forms of Material: Patents
Languages: English
Repository: Purdue University Libraries, Archives and Special Collections
Alternate Extent Statement: 11 items
Access Restrictions: Collection is open for research.
Preferred Citation: MSA 142, Robert Hofstetter papers, Archvies and Special Collections, Purdue University Libraries
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]
