CH304196A
(en )
1954-12-31
Telephone system with subscriber set.
CH280041A
(en )
1951-12-31
Charge displays at subscriber stations in telecommunication systems, in particular telephone systems.
CH324915A
(en )
1957-10-15
Circuit arrangement for telecommunications, in particular telephone systems
AT170562B
(en )
1952-03-10
Charge displays at subscriber stations in telecommunication systems, in particular telephone systems
CH274444A
(en )
1951-03-31
Telephone subscriber station with back hearing loss for ZB operation.
CH274625A
(en )
1951-04-15
Telephone subscriber station.
CH315053A
(en )
1956-07-15
Circuit arrangement in telecommunication systems, in particular telephone systems
CH353408A
(en )
1961-04-15
Circuit arrangement for subscriber station in telecommunication systems, in particular telephone systems, with keypad selection
CH275990A
(en )
1951-06-15
Telephone subscriber station.
CH314163A
(en )
1956-05-31
Selector switches for telecommunication systems, in particular telephone systems
CH281290A
(en )
1952-02-29
Telephone subscriber station.
CH385927A
(en )
1964-12-31
Circuit arrangement for subscriber stations in telecommunication systems, in particular telephone systems
CH316033A
(en )
1956-09-15
Telephone subscriber station
AT182752B
(en )
1955-08-10
Motor selector in telecommunication systems, in particular telephone systems
CH296854A
(en )
1954-02-28
Switching device, in particular dialers for telecommunications systems.
AT180085B
(en )
1954-11-10
Circuit arrangement for telecommunications systems, in particular for telephone systems with dialer operation
AT173161B
(en )
1952-11-25
Circuit arrangement for telecommunications systems, in particular telephone systems with dialer operation and number surge receivers located behind the line dialer
AT185412B
(en )
1956-04-25
Automatic telephone dialing system
CA459549A
(en )
1949-09-06
Party line telephone system
AT180600B
(en )
1954-12-27
Intercom station for telephone systems, in particular subscriber stations
AT175612B
(en )
1953-07-25
Circuit arrangement for telecommunications, in particular telephone dialing systems
CH313884A
(en )
1956-05-15
Circuit arrangement for limiting the test time in telecommunication systems with dialer operation, especially in telephone systems
GR14403B
(en )
1953-05-05
CONNECTION DEVICE FOR TELECOMMUNICATION FACILITIES, SAME BY TELEPHONE FACILITIES WITH SELECTORS.
AT173486B
(en )
1952-12-27
Circuit arrangement in telephone systems with group dialers
AT194916B
(en )
1958-01-25
Dialing device for telecommunication systems, in particular for telephone dialing systems