CH357093A
(en )
1961-09-30
Arrangement for monitoring the condition of lines in telecommunications systems
CH291949A
(en )
1953-07-15
Circuit for telephone systems for receiving signals.
CH339258A
(en )
1959-06-30
Circuit arrangement for switching systems
AT167951B
(en )
1951-03-27
Circuit arrangement for telecommunications systems for monitoring pulses
FR1062271A
(en )
1954-04-21
Coding circuit
FR1044603A
(en )
1953-11-19
Electrical signaling systems
CH312614A
(en )
1956-01-31
Circuit arrangement for telecommunication systems for issuing different indicators
AT185847B
(en )
1956-06-11
Electrical communication system
AT169525B
(en )
1951-11-26
Hybrid circuit for telegraph systems
CH314511A
(en )
1956-06-15
Telecommunication system
CH326802A
(en )
1957-12-31
Telegraph equipment
AT173739B
(en )
1953-01-26
Circuit arrangement for pulse control
CH302755A
(en )
1954-10-31
Circuit for an automatic telecommunication system for setting voters.
FR1076874A
(en )
1954-11-02
Advanced wiper
AT182152B
(en )
1955-06-10
Circuit for monitoring DC circuits
ES193461A1
(en )
1950-10-16
IMPROVEMENTS IN TELECOMMUNICATION SYSTEMS
AT173496B
(en )
1952-12-27
Protection circuit for intermediate voltage systems
AT185853B
(en )
1956-06-11
Circuit arrangement for the identification of lines
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
AT182123B
(en )
1955-05-25
Electrical communication system
DK84959C
(en )
1958-02-03
Electrical signaling system.
FR1105906A
(en )
1955-12-09
Wiper
FR1103879A
(en )
1955-11-08
Wiper
FR1100563A
(en )
1955-09-21
Faucet equipment
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges