|
US2411147A
|
|
Remote-control system and apparatus
|
|
US2366363A
|
|
Frequency modulation system
|
|
US2404566A
|
|
Telephoto system
|
|
US2341315A
|
|
Telefacsimile system
|
|
US2336673A
|
|
Electro-optical signaling system
|
|
US2397535A
|
|
Moving web recording machine
|
|
US2363398A
|
|
Facsimile machine
|
|
US2328056A
|
|
Keying arrangement for electric signaling systems
|
|
US2298466A
|
|
Electro-optical system and apparatus
|
|
US2268496A
|
|
Electro-optical transmission system
|
|
US2403059A
|
|
Secrecy telefacsimile system
|
|
US2260511A
|
|
Spacing control for telefacsimile systems and the like
|
|
US2280688A
|
|
Electro-optical transmission system and apparatus
|
|
US2275249A
|
|
Phasing arrangement for telefacsimile machines
|
|
US2276936A
|
|
Composite electric motor
|
|
US2257158A
|
|
Synchronous motor circuit
|
|
US2282461A
|
|
Electro-optical system and apparatus
|
|
CA405837A
|
|
Synchronous motor circuit
|
