Browse Items (2 total)

Source is exactly "The William P. and Moya Olsen Lear Papers (2000-06-20), Box 3, Folder 10"

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[Man using Learadio portable marker transmitter]

Photograph of a man using a Learadio portable marker transmitter in an open field, circa 1931-1939.Inscription: "First completely portable outer or inner marker transmitter for radio compass [illegible]."

[Learadio portable transceiver and travel case]

Photograph of a Learadio portable transceiver and travel case, circa 1931-1939.Inscription: "Portable transceiver for [illegible] use."

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