Browse Items (79 total)

Advertisement poster for Learadio aircraft equipment, circa 1931-1939.

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.

Brochure for the Learadio Model T30-R3AB aircraft transmitter-receiver, circa 1939.

Brochure for the Learadio Model UT-6 radio transmitter, circa 1939.

Report about the Lear Developments automatic landing field orientation device, June 1939. Contains technical details about the device. Three typed pages on Learadio letterhead.

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…

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 /…

Lithographic map of Roosevelt Field, Long Island, New York, circa 1931-1939. Several locations are noted on the map, including Learadio Laboratories (location "J").

Photograph of William P. Lear with his Waco UIC aircraft, circa 1933. Inscription on verso: "1935 / WPL entering 1933 Continental Powered Waco preparatory to NY Los Angeles trip when Model L DF was shown to whole USA and many CAA stations for the…

Photograph of William P. Lear with his Stinson SR Reliant aircraft at Roosevelt Field, Mineola, New York, August 1933. Typed caption on verso: "Bill Lear seizes the opportunity to pose with his newly acquired 'Executive Model Stinson Relient [sic]'.…