CH301275A
(en )
1954-08-31
Telecommunications exchange system.
CH274392A
(en )
1951-03-31
Telecommunications exchange system.
CH276568A
(en )
1951-07-15
Subscriber circuit in an automatic telephone system.
DK81610C
(en )
1956-12-10
Switching systems for establishing connections, eg in automatic telephone exchange systems.
CH270706A
(en )
1950-09-15
Automatic telephone system.
DK80669C
(en )
1956-03-12
Signaling systems, in particular for automatic telephone systems.
DK71857C
(en )
1950-12-18
Switching systems, eg for automatic telephone exchange systems.
DK83455C
(en )
1957-09-23
Dispatch location for telephone exchange systems for operating remote connections.
DK74027C
(en )
1952-04-21
Coupling to signaling systems, in particular automatic telephone systems.
CH270999A
(en )
1950-09-30
Telephone exchange.
DK77276C
(en )
1954-03-22
Coupling to automatic telephone exchanges for sending out automatically repeated ringtones.
DK73390C
(en )
1951-11-19
Coordinate selector for automatic telephone systems.
DK91326C
(en )
1961-07-17
Automatic telephone exchange with subscriber circuits.
ES174651A1
(en )
1946-10-01
IMPROVEMENTS IN AUTOMATIC OR SEMIAUTOMATIC TELEPHONE CENTRAL SYSTEMS.
CH285955A
(en )
1952-09-30
Switching device for establishing connections in telecommunications systems.
DK78682C
(en )
1955-01-03
Automatic telephone system.
CH264145A
(en )
1949-09-30
Equipment in telecommunication systems, for the execution of switching processes at the subscriber.
DK86025C
(en )
1958-08-11
Automatic dialing system, in particular automatic telephone or telegraph system.
DK70527C
(en )
1950-01-23
Dishwasher.
DK76817C
(en )
1953-12-14
Automatic telephone exchange system with party subscriber stations.
IE19213L
(en )
1948-04-04
Automatic exchange systems.
CH273879A
(en )
1951-02-28
Crossbar switch for automatic telephone systems.
CH301278A
(en )
1954-08-31
Telephone system with several exchanges, which can be reached via different connection paths
DK73242C
(en )
1951-10-22
Contact device, especially selector for automatic telephone systems.
IE18864L
(en )
1945-11-01
Automatic telephone exchange systems.