FR1127047A
(en )
1956-12-06
Circuit breaker
CH350687A
(en )
1960-12-15
Electrical network for logical operations
CH342994A
(en )
1959-12-15
Hybrid circuit
GB841836A
(en )
1960-07-20
Electronic telephone system
CH351641A
(en )
1961-01-31
Circuit arrangement in telecommunications systems
AT193949B
(en )
1957-12-10
Circuit arrangement for community connections in telephone systems
CH313271A
(en )
1956-03-31
Circuit arrangement for an automatic telephone system
CH347861A
(en )
1960-07-31
Rotary dial for telecommunications and telephone systems
FR1165166A
(en )
1958-10-20
Electronic telephone exchange
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems
CH344765A
(en )
1960-02-29
Circuit breaker
CH344117A
(en )
1960-01-31
Low-liquid circuit breaker
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
FR71365E
(en )
1959-12-22
Electrical calculator circuits
FR1156776A
(en )
1958-05-21
Telephone dial
AT196918B
(en )
1958-04-10
Electrical filter in branch circuit
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges
CH334100A
(en )
1958-11-15
Circuit breaker
AT190557B
(en )
1957-07-10
Test arrangement for telecommunications systems
AT174955B
(en )
1953-05-26
Circuit arrangement for multiple telephones
AT188765B
(en )
1957-02-11
Circuit arrangement for telephone systems with two-way connections
AT189659B
(en )
1957-04-25
Dialing device for message systems
AT174090B
(en )
1953-02-25
Circuit arrangement for telephone systems with direct dialing
AT193436B
(en )
1957-11-25
Circuit arrangement for telephone private branch exchanges