CH291949A
(en )
1953-07-15
Circuit for telephone systems for receiving signals.
FR1109009A
(en )
1956-01-20
Telephone circuit
CH324915A
(en )
1957-10-15
Circuit arrangement for telecommunications, in particular telephone systems
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
CH315749A
(en )
1956-08-31
Circuit arrangement for subscriber telephone station
AT173486B
(en )
1952-12-27
Circuit arrangement in telephone systems with group dialers
CH315053A
(en )
1956-07-15
Circuit arrangement in telecommunication systems, in particular telephone systems
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
AT181636B
(en )
1955-04-12
Circuit arrangement for telephone extension systems with dialer operation
AT174090B
(en )
1953-02-25
Circuit arrangement for telephone systems with direct dialing
CH274631A
(en )
1951-04-15
Circuit arrangement in telecommunications systems with dialer operation.
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges
CH302752A
(en )
1954-10-31
Circuit arrangement for telephone systems with main and sub-offices.
AT180085B
(en )
1954-11-10
Circuit arrangement for telecommunications systems, in particular for telephone systems with dialer operation
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
AT168002B
(en )
1951-04-10
Circuit arrangement for line selectors in telephone systems
CH313882A
(en )
1956-05-15
Circuit arrangement for telecommunications systems, in particular for telephone systems with dialer operation
CH302751A
(en )
1954-10-31
Circuit arrangement for telephone systems with community connections.
CH313884A
(en )
1956-05-15
Circuit arrangement for limiting the test time in telecommunication systems with dialer operation, especially in telephone systems
CH311994A
(en )
1955-12-15
Circuit arrangement for telex extension systems with dialer operation.
AT172866B
(en )
1952-10-25
Dial with call switch
CH297205A
(en )
1954-03-15
Telephone with illuminated rotary dial.
AT172816B
(en )
1952-10-25
Circuit arrangement for company lines in telecommunications, in particular telephone systems
AT180965B
(en )
1955-02-10
Contact field for voters in telecommunications systems, especially telephone systems