FR1129507A
(en )
1957-01-22
Reversing electrical circuits
CH333375A
(en )
1958-10-15
Single sideband system for call transmission
CH429843A
(en )
1967-02-15
Search circuit for extension line groups in electronic telecommunications switchgear
CH331709A
(en )
1958-07-31
Switching network for transmission purposes
CH354122A
(en )
1961-05-15
Telecommunications installation
CH320547A
(en )
1957-03-31
Protective circuit for high-voltage lines with series capacitors
CH351641A
(en )
1961-01-31
Circuit arrangement in telecommunications systems
AT243332B
(en )
1965-11-10
Circuit arrangement for pay phone
AT244397B
(en )
1966-01-10
Circuit arrangement for pay phone
AT189291B
(en )
1957-03-11
Circuit arrangement for rectifier devices
AT187950B
(en )
1956-12-10
Circuit arrangement for voters with several traffic directions
NL189226B
(en )
TELECOMMUNICATIONS SYSTEM.
AT196456B
(en )
1958-03-25
Circuit arrangement for telephone stations with back loss
AT190107B
(en )
1957-06-11
Circuit arrangement for telephone stations with back loss
AT189655B
(en )
1957-04-25
Matrix selector for telecommunications systems
CH346248A
(en )
1960-05-15
Telephone system
AT183799B
(en )
1955-11-10
Circuit arrangement for line selectors with single and multiple connections
AT188765B
(en )
1957-02-11
Circuit arrangement for telephone systems with two-way connections
AT199229B
(en )
1958-08-25
Circuit arrangement for telephone systems
AT193948B
(en )
1957-12-10
Circuit arrangement for a telephone system with dialer operation
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
CH319080A
(en )
1957-01-31
Circuit arrangement for telephone systems with call seekers
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
AT190105B
(en )
1957-06-11
Circuit arrangement for telephone systems with direct remote dialing
AT189239B
(en )
1957-03-11
Circuit arrangement in telecommunication systems, in particular telephone systems with motor selectors