CH324915A
(en )
1957-10-15
Circuit arrangement for telecommunications, in particular telephone systems
CH329942A
(en )
1958-05-15
Circuit arrangement for free selection processes in telecommunication systems, in particular telephone systems
AT180600B
(en )
1954-12-27
Intercom station for telephone systems, in particular subscriber stations
CH274444A
(en )
1951-03-31
Telephone subscriber station with back hearing loss for ZB operation.
CH315749A
(en )
1956-08-31
Circuit arrangement for subscriber telephone station
CH315053A
(en )
1956-07-15
Circuit arrangement in telecommunication systems, in particular telephone systems
CH317711A
(en )
1956-11-30
Multiple switches for telecommunication systems, in particular telephone systems
CH314163A
(en )
1956-05-31
Selector switches for telecommunication systems, in particular telephone systems
AT172816B
(en )
1952-10-25
Circuit arrangement for company lines in telecommunications, in particular telephone systems
AT173737B
(en )
1953-01-26
Rotary selector for telecommunication systems, in particular telephone systems
AT172559B
(en )
1952-09-25
Dialer for telecommunications, in particular telephone systems
CH281290A
(en )
1952-02-29
Telephone subscriber station.
AT180965B
(en )
1955-02-10
Contact field for voters in telecommunications systems, especially telephone systems
CH296854A
(en )
1954-02-28
Switching device, in particular dialers for telecommunications systems.
CH288597A
(en )
1953-01-31
Rotary selector for telecommunication systems, in particular telephone systems.
AT178381B
(en )
1954-05-10
Rotary selector for telecommunications, in particular telephone systems
CH305581A
(en )
1955-02-28
Circuit arrangement for telecommunication systems with relay selectors, in particular telephone systems.
AT182415B
(en )
1955-06-25
Selector relays for telecommunications, in particular telephone systems
CH280041A
(en )
1951-12-31
Charge displays at subscriber stations in telecommunication systems, in particular telephone systems.
AT175612B
(en )
1953-07-25
Circuit arrangement for telecommunications, in particular telephone dialing systems
AT194916B
(en )
1958-01-25
Dialing device for telecommunication systems, in particular for telephone dialing systems
CH347230A
(en )
1960-06-30
Dialing device for telecommunication systems, in particular for telephone dialing systems
CH305582A
(en )
1955-02-28
Circuit arrangement for telecommunications, in particular telephone systems with relay selectors.
CH308703A
(en )
1955-07-31
Rotary selector for telecommunications, in particular telephone systems.
CH316033A
(en )
1956-09-15
Telephone subscriber station