CH330684A
(en )
1958-06-15
Communication facility
CH333375A
(en )
1958-10-15
Single sideband system for call transmission
CH324912A
(en )
1957-10-15
Two-way amplifier circuit
CH329942A
(en )
1958-05-15
Circuit arrangement for free selection processes in telecommunication systems, in particular telephone systems
FR1167600A
(en )
1958-11-26
Sophisticated telephone system
AT188765B
(en )
1957-02-11
Circuit arrangement for telephone systems with two-way connections
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
CH313271A
(en )
1956-03-31
Circuit arrangement for an automatic telephone system
CH319080A
(en )
1957-01-31
Circuit arrangement for telephone systems with call seekers
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges
AT179806B
(en )
1954-10-11
Circuit arrangement for zoning devices for telephone systems
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
AT174090B
(en )
1953-02-25
Circuit arrangement for telephone systems with direct dialing
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems
AT190105B
(en )
1957-06-11
Circuit arrangement for telephone systems with direct remote dialing
CH323788A
(en )
1957-08-15
Circuit arrangement for telecommunications systems with motor selectors
AT182136B
(en )
1955-05-25
Switching system and circuit arrangement for telephone systems with dialer operation
CH302752A
(en )
1954-10-31
Circuit arrangement for telephone systems with main and sub-offices.
CH302751A
(en )
1954-10-31
Circuit arrangement for telephone systems with community connections.
AT187950B
(en )
1956-12-10
Circuit arrangement for voters with several traffic directions
CH319798A
(en )
1957-02-28
Circuit arrangement for selective call receivers
FR1108310A
(en )
1956-01-11
Connection terminal
FR1096523A
(en )
1955-06-21
Advanced two-way telephone link
AT190107B
(en )
1957-06-11
Circuit arrangement for telephone stations with back loss
AT196456B
(en )
1958-03-25
Circuit arrangement for telephone stations with back loss