FR942947A
(en )
1949-02-22
Circuit switches
CH217058A
(en )
1941-09-30
Circuit switch.
CH217056A
(en )
1941-09-30
Circuit switch.
FR938275A
(en )
1948-09-09
Circuit switches
AT167988B
(en )
1951-03-27
Circuit arrangement for electrical telecommunications systems with at least partial voter operation
CH256667A
(en )
1948-08-31
Automatic circuit breaker.
CH252653A
(en )
1948-01-15
Circuit arrangement in telecommunications systems.
CH225893A
(en )
1943-02-28
Button for telecommunications, in particular telephone systems.
CH217142A
(en )
1941-09-30
Puncturing device for switching and control elements.
CH215758A
(en )
1941-07-15
Electrical multiple switch.
CH221774A
(en )
1942-06-15
Switching device for change gears.
CH225252A
(en )
1943-01-15
Switching arrangement for alternating current interruption devices.
CH206560A
(en )
1939-08-15
Circuit arrangement for telephone systems with main and sub-offices and voter operation.
CH233692A
(en )
1944-08-15
Circuit arrangement in telecommunication systems, in particular telephone systems.
CH224320A
(en )
1942-11-15
Circuit arrangement for command intercom loudspeaker system.
CH225673A
(en )
1943-02-15
Circuit arrangement for switching off branch points in telephone systems with connecting lines equipped with several branch points.
CH280333A
(en )
1952-01-15
Switchgear for an automatic telephone exchange.
CH226358A
(en )
1943-03-31
Circuit arrangement for telephone systems with main and sub-offices.
CH244782A
(en )
1946-09-30
Circuit arrangement for telephone systems with main and sub-offices.
CH222911A
(en )
1942-08-15
Circuit arrangement for command intercom loudspeaker systems.
CH231803A
(en )
1944-04-15
Circuit arrangement in telephone systems with preset mixed selectors.
CH222909A
(en )
1942-08-15
Circuit arrangement for telex extension systems with dialer operation.
CH228071A
(en )
1943-07-31
Relays for switching devices.
CH231157A
(en )
1944-02-29
Circuit arrangement in telephone systems with connecting lines provided with several branch points.
CH203262A
(en )
1939-02-28
Circuit arrangement for telex switching systems.