CH388394A
(en )
1965-02-28
Crossing point network for telecommunication systems with time division multiplex
CH361310A
(en )
1962-04-15
Automatic telecommunication system
CH350687A
(en )
1960-12-15
Electrical network for logical operations
CH334854A
(en )
1958-12-15
Button for telecommunication systems
FR1176178A
(en )
1959-04-07
Central office telecommunications systems
CH331709A
(en )
1958-07-31
Switching network for transmission purposes
CH357441A
(en )
1961-10-15
Switching network for messaging
CH343465A
(en )
1959-12-31
Telephone installation
AT201130B
(en )
1958-12-10
Switching network for communication systems
CH358837A
(en )
1961-12-15
Transmission switching system, in particular for telephone purposes
FR1178709A
(en )
1959-05-14
Communications switching system
CH359168A
(en )
1961-12-31
Subscriber line circuit
FR1179110A
(en )
1959-05-21
Communications switching network
FR1165105A
(en )
1958-10-20
Telecommunication network
CH363674A
(en )
1962-08-15
Telegraph subscriber station
CH356498A
(en )
1961-08-31
Double coincidence circuit for telecommunication systems, in particular telephone systems
FR1187760A
(en )
1959-09-16
Contact details selector for telephone systems
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems
AT180981B
(en )
1955-02-10
Telecommunication system
CH329910A
(en )
1958-05-15
Selective network
BE563381A
(en )
1960-06-17
Automatic telecommunication exchange
AT198325B
(en )
1958-06-25
Contact spring set switches for telecommunication systems
DK88467C
(en )
1960-02-01
Monitoring connection to telecommunication systems.
FR1153202A
(en )
1958-03-04
equipment for telecommunication stations
BE560597A
(en )
1960-04-22
Automatic telecommunication system