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Flightray Instrument for blind landing 1941
Flightray
A Sixth Sense for The Pilot
by David Robinson George
TWA 'Flight 42, calling LaGuardia! TWA Flight 42, calling LaGuardia! Come in, please."
Portable Amplified Hearing Aid 1942
Portable Amplifier Aids the Deaf
Because of its surprising power this ampliÂfier can also be used for other purposes such as detective work. Extension of "mike" cable is only change needed.
by Walter E. Burton
Portable Amplifier Hearing Aid 1942
This complete hearing aid consists of an amplifier unit with microphone and volume control, a battery unit, and single earphone with headband.
Hearing Aid 1942
Using 3 miniature amplifier tubes and powered by standard radio and flashlight batteries.
OPM Image or Symbol 1942 Office of Personnel Management
From article in March 1942 Popular Science
OPM symbol
Office of Personnel Management
Home Craftsmen 1942
From article in March 1942 Popular Science
War-Work Registration For Home Craftsmen Example
War-Work Registration Form For Home Craftsmen 4
From article in March 1942 Popular Science
War-Work Registration Form For Home Craftsmen