FR1070400A
(en )
1954-07-23
Switching system for automatic telegraphs
CH300213A
(en )
1954-07-15
Switching installation.
CH294912A
(en )
1953-11-30
Automatic telephony installation.
CH287723A
(en )
1952-12-15
Automatic switching device for telecommunication exchange.
CH275635A
(en )
1951-05-31
Automatic telephone registration system.
CH311996A
(en )
1955-12-15
Automatic switching equipment for telecommunications installation.
CH282893A
(en )
1952-05-15
Communication facility.
CH301265A
(en )
1954-08-31
Automatic switching installation for teleprinter network.
CH287409A
(en )
1952-11-30
Automatic switching installation for telecommunications.
CH295259A
(en )
1953-12-15
Powerline communication installation.
CH304899A
(en )
1955-01-31
Automatic telecommunications installation.
CH271525A
(en )
1950-10-31
Station for sound transmission installation.
FR1029508A
(en )
1953-06-03
Rotary selector for automatic telephone installation
FR1010031A
(en )
1952-06-06
Automatic installation switch, plug-shaped
CH297627A
(en )
1954-03-31
Automatic switching installation for telecommunications.
CH288596A
(en )
1953-01-31
Switching installation for telecommunication exchange.
FR60514E
(en )
1954-11-09
Improvements to automatic switching systems
CH299889A
(en )
1954-06-30
Automatic switching facility.
CH311427A
(en )
1955-11-30
Automatic telegraph or telephone switching installation.
CH289855A
(en )
1953-03-31
Automatic telephone switching installation.
FR1025104A
(en )
1953-04-10
Switching system for electrical multiplex communications
CH279119A
(en )
1951-11-15
Device for selecting an automatic telecommunications installation.
CH282553A
(en )
1952-04-30
Marking device for automatic switching.
CH316038A
(en )
1956-09-15
Automatic switching installation
FR1001468A
(en )
1952-02-25
Telephone repeater automatic switching system