|
US2922013A
|
|
Switch wiper assembly
|
|
US2890316A
|
|
Detachable wiper assembly for stepping switches
|
|
GB855410A
|
|
Tone controlled telephone answering device
|
|
US2929351A
|
|
Sound control for telephone ringer
|
|
GB875269A
|
|
Automatic disconnect apparatus in a telephone answering device
|
|
GB864937A
|
|
Automatic telephone dialing apparatus
|
|
US2921984A
|
|
Small suboffice telephone system
|
|
US2917582A
|
|
Toll ticketing system remote operator trunk
|
|
US2921988A
|
|
Telephone system dial back trunk
|
|
GB873139A
|
|
Telephone subscriber station
|
|
US2911480A
|
|
Small suboffice telephone system
|
|
GB849530A
|
|
Telephone apparatus employing transistor amplifiers
|
|
US2934608A
|
|
Digit absorbing selector switch
|
|
US2896044A
|
|
Magnetostrictive relay
|
|
DE1055054B
|
|
Circuit arrangement for converters in telephone systems
|
|
US2896048A
|
|
Sensitive relay
|
|
US2914624A
|
|
Automatic routiner for selector and connector switches
|
|
US2897273A
|
|
Automatic toll ticketing telephone system
|
|
US2894096A
|
|
Rotary switch
|
|
US2862063A
|
|
Combined dial and transmission network mounting bracket
|
