Pamphlet about Learadio aircraft radio equipment, circa 1930s. Contains technical specifications and images of various models of transmitters, receivers, power supplies, and accessories. 41 pages.
Check and agreement between the Stinson Aircraft Corporation and the Lear Development Company, circa 1933. Item has been de-framed but remains attached to mountboard.
Items from Box 1, Folder 4 of the William P. and Moya Olsen Lear Papers, May to October 1938 and August 1979. Contains five typed letters and four telegrams between William P. Lear and Cass S. Hough, primarily discussing installation,…
Letter to Mr. J. K. Whanger, Lawrence Scudder and Company, from Richard A. Marsen, Lear Developments, June 19, 1939. Provides a "general outline of the patent situation at Lear Developments." Seven typed pages and original folder labeled "L-r2 /…
Letter to William P. Lear from Richard A. Marsen, June 20, 1939. Recommends that the company take a more general tone when announcing and publicizing products in order to protect Lear Developments' patents. References an Associated Press release…
Items from Box 1, Folder 14 of the William P. and Moya Olsen Lear Papers, June to July 1935. Contains four typed letters between Gordon Scheibell and N. E. Wunderlich and a page of notes for a therapeutic and beauty treatment involving electrodes.…
Photograph of a TWA Douglas DC-1 aircraft (tail and wing number NR223Y) at an airfield, circa 1935-1938. A man in a TWA jumpsuit stands near the aircraft. The caption notes that this aircraft was outfitted with a Model L Learscope during its…
Photograph of a Lear Developments BC-190-T5 radio transmitter, circa 1940. The verso inscription notes that this transmitter was developed for the U.S. Army Signal Corps and describes the device's components and specifications.Inscription on verso:…
Photograph of a Lear Developments Type T-120 transmitter, circa 1936-1939. The caption on verso notes that transmitter was developed for the Royal Canadian Air Force and describes the device's components and specifications. Caption on verso: "J. This…