|
US2256579A
|
|
Repeating device for gramophones
|
|
US2243126A
|
|
Repeater for phonographs
|
|
US2256578A
|
|
Talking machine
|
|
US2192757A
|
|
Talking machine with repetition device
|
|
US2053742A
|
|
Station-name indicator for radio receivers
|
|
US1953265A
|
|
Device for the adjustment of receiving sets for wireless waves
|
|
US1833592A
|
|
Wireless receiving apparatus
|
|
US1471708A
|
|
Electrical apparatus for indicating and repeating movements at a distance
|
|
US1409586A
|
|
Apparatus for controlling movements at a distance
|
|
US1372043A
|
|
Apparatus for directing searchlights by the sound of aerial objectives
|
|
US1345707A
|
|
Apparatus for regulating the firing of anti-aircraft guns
|
|
US1345705A
|
|
Anti-aircraft fire-control apparatus
|
|
US1345704A
|
|
Anti-aircraft tracker
|
|
US1345703A
|
|
Anti-aircraft gunfire-control apparatus
|
|
US1345700A
|
|
Anti-aircraft gunfire-control system
|
|
US1345698A
|
|
Anti-aircraft gunfire control
|
|
US1345697A
|
|
Anti-aircraft-control system
|
