CH329942A
(en )
1958-05-15
Circuit arrangement for free selection processes in telecommunication systems, in particular telephone systems
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
CH315749A
(en )
1956-08-31
Circuit arrangement for subscriber telephone station
AT181636B
(en )
1955-04-12
Circuit arrangement for telephone extension systems with dialer operation
CH313271A
(en )
1956-03-31
Circuit arrangement for an automatic telephone system
CH347861A
(en )
1960-07-31
Rotary dial for telecommunications and telephone systems
AT174090B
(en )
1953-02-25
Circuit arrangement for telephone systems with direct dialing
CH319080A
(en )
1957-01-31
Circuit arrangement for telephone systems with call seekers
AT182136B
(en )
1955-05-25
Switching system and circuit arrangement for telephone systems with dialer operation
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges
AT188765B
(en )
1957-02-11
Circuit arrangement for telephone systems with two-way connections
CH304562A
(en )
1955-01-15
Housings for telephone sets.
AT179806B
(en )
1954-10-11
Circuit arrangement for zoning devices for telephone systems
CH311994A
(en )
1955-12-15
Circuit arrangement for telex extension systems with dialer operation.
CH319798A
(en )
1957-02-28
Circuit arrangement for selective call receivers
CH313882A
(en )
1956-05-15
Circuit arrangement for telecommunications systems, in particular for telephone systems with dialer operation
AT173488B
(en )
1952-12-27
Circuit arrangement for sub-exchanges in telephone systems with dialer operation
AT170194B
(en )
1952-01-25
Circuit arrangement for sub-exchanges in telephone systems with dialer operation
AT193433B
(en )
1957-11-25
Circuit arrangement for telecommunications, in particular telephone systems
AT190105B
(en )
1957-06-11
Circuit arrangement for telephone systems with direct remote dialing
AT192968B
(en )
1957-11-11
Circuit arrangement for telecommunication systems, in particular telephone systems with dial-up operation
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
AT193948B
(en )
1957-12-10
Circuit arrangement for a telephone system with dialer operation
AT174955B
(en )
1953-05-26
Circuit arrangement for multiple telephones
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems