FR1126455A
(en )
1956-11-23
Automatic telephone
CH331072A
(en )
1958-06-30
Circuit arrangement for a subscriber line in an automatic telephone exchange
CH333375A
(en )
1958-10-15
Single sideband system for call transmission
FR1145178A
(en )
1957-10-23
Automatic telephone
AT193948B
(en )
1957-12-10
Circuit arrangement for a telephone system with dialer operation
CH332350A
(en )
1958-08-31
Dial for automatic telephony
CH336098A
(en )
1959-02-15
Test facility in a telephone system
AT186677B
(en )
1956-09-10
Circuit arrangement for a subscriber line
CH359168A
(en )
1961-12-31
Subscriber line circuit
CH346248A
(en )
1960-05-15
Telephone system
AT189291B
(en )
1957-03-11
Circuit arrangement for rectifier devices
AT196456B
(en )
1958-03-25
Circuit arrangement for telephone stations with back loss
AT190107B
(en )
1957-06-11
Circuit arrangement for telephone stations with back loss
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
NL189226B
(en )
TELECOMMUNICATIONS SYSTEM.
AT190105B
(en )
1957-06-11
Circuit arrangement for telephone systems with direct remote dialing
AT189240B
(en )
1957-03-11
Telephone station
AT187154B
(en )
1956-10-25
Number switch for telephones
AT187152B
(en )
1956-10-25
Control device for a carrier frequency telephone connection
FR70367E
(en )
1959-04-06
Automatic telephone
FR1101230A
(en )
1955-10-04
Telephone selector
CH323788A
(en )
1957-08-15
Circuit arrangement for telecommunications systems with motor selectors
AT196454B
(en )
1958-03-25
Circuit arrangement for telephone exchanges with numeric encoders
FR1156776A
(en )
1958-05-21
Telephone dial
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems