CH319034A
(en )
1957-01-31
Switching device, in particular for periodic switching
CH329942A
(en )
1958-05-15
Circuit arrangement for free selection processes in telecommunication systems, in particular telephone systems
AT191946B
(en )
1957-09-25
Circuit arrangement for pulse transmission, in particular with pulse equalization, in telecommunications systems
CH420277A
(en )
1966-09-15
Electronic ringing pulse generator, in particular for automatic telephone systems with number presetting
CH315053A
(en )
1956-07-15
Circuit arrangement in telecommunication systems, in particular telephone systems
AT257701B
(en )
1967-10-25
Circuit arrangement for telecommunication, in particular telephone systems with two-way connections
CH351641A
(en )
1961-01-31
Circuit arrangement in telecommunications systems
AT257699B
(en )
1967-10-25
Circuit arrangement for control purposes in telecommunication systems with coupling fields, in particular in telephone systems
AT191478B
(en )
1957-08-26
Circuit arrangement for zoners with pulse repeaters in telecommunication, in particular telephone networks
AT189239B
(en )
1957-03-11
Circuit arrangement in telecommunication systems, in particular telephone systems with motor selectors
CH364531A
(en )
1962-09-30
Circuit arrangement for an electronic selector for detouring in telecommunication systems, in particular telephone systems
CH374104A
(en )
1963-12-31
Telecommunication system with relay-free subscriber line circuits
AT266227B
(en )
1968-11-11
Circuit arrangement for centrally controlled telecommunication systems, in particular telephone systems, with two-way connections
AT191948B
(en )
1957-09-25
Circuit arrangement for receiving pulses, in particular for telegraphy systems
AT190107B
(en )
1957-06-11
Circuit arrangement for telephone stations with back loss
AT196456B
(en )
1958-03-25
Circuit arrangement for telephone stations with back loss
CH323788A
(en )
1957-08-15
Circuit arrangement for telecommunications systems with motor selectors
AT193433B
(en )
1957-11-25
Circuit arrangement for telecommunications, in particular telephone systems
AT191940B
(en )
1957-09-25
Motor selectors for telecommunications, in particular telephone systems
CH353407A
(en )
1961-04-15
Circuit arrangement for an electronic selector for detouring in telecommunications, in particular telephone systems
AT192968B
(en )
1957-11-11
Circuit arrangement for telecommunication systems, in particular telephone systems with dial-up operation
AT197442B
(en )
1958-04-25
Circuit arrangement for direction selector in telecommunication systems, in particular telephone systems
AT189655B
(en )
1957-04-25
Matrix selector for telecommunications systems
CH379585A
(en )
1964-07-15
Circuit arrangement for telecommunications, in particular telephone systems with frequency selection
AT182753B
(en )
1955-08-10
Group selection device for automatic switching systems, in particular telephone systems