Patents, 1923-1932

File — Box: Communal Collections 8, Placement: 01, Folder: 1

Identifier: Folder 1

Staff Only

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]