FR1140496A
(en )
1957-07-23
Terminal clamp
CH371486A
(en )
1963-08-31
Automatic telecommunication system
FR1139471A
(en )
1957-07-01
Terminal clamp
BE606073A
(en )
1962-01-15
Signaling system for subscriber devices.
FR1167600A
(en )
1958-11-26
Sophisticated telephone system
DK95650C
(en )
1963-03-25
Electrical connection for identification of subscriber lines in signaling systems.
NL172387B
(en )
TELECOMMUNICATIONS SYSTEM.
NL189226B
(en )
TELECOMMUNICATIONS SYSTEM.
CH359168A
(en )
1961-12-31
Subscriber line circuit
CH351641A
(en )
1961-01-31
Circuit arrangement in telecommunications systems
FR1167621A
(en )
1958-11-27
Signaling terminal
CH363380A
(en )
1962-07-31
Circuit arrangement for establishing connections in telecommunication systems, in particular telephone systems
CH346248A
(en )
1960-05-15
Telephone system
CH374104A
(en )
1963-12-31
Telecommunication system with relay-free subscriber line circuits
AT202198B
(en )
1959-02-10
Circuit arrangement for the identification of crosspoints in telecommunications, - in particular telephone systems.
FR1180248A
(en )
1959-06-02
Converter circuit for telephone systems
FR1138127A
(en )
1957-06-11
Connection terminal
DK107952C
(en )
1967-07-24
Automatic telephone system.
GR15377B
(en )
1954-06-03
ELECTRICAL SIGNALING SYSTEM - BUS VEHICLES - FOR STATION.
AT180981B
(en )
1955-02-10
Telecommunication system
DK87335C
(en )
1959-05-25
Systems for automatic telephone exchanges.
FR1215502A
(en )
1960-04-19
Circuit for auxiliary telephone systems
DK86996C
(en )
1959-03-09
Electrical communication system.
DK92078C
(en )
1961-10-30
Electrical identification system.
AT196926B
(en )
1958-04-10
Circuit arrangement for connecting subscriber lines to connecting lines in telephone systems with relay selectors