NO119851B
(en:Method )
1970-07-13
GB663574A
(en )
1951-12-27
Improvements in or relating to electrical circuits employing static electrical switches
US1867209A
(en )
1932-07-12
Alarm selector apparatus
US2235804A
(en )
1941-03-18
Automatic signal responsive device
NO115549B
(en:Method )
1968-10-21
GB573869A
(en )
1945-12-11
Improvements in or relating to electric impulse receiving arrangements
US2331914A
(en )
1943-10-19
Telegraph transmitting system
US3299216A
(en )
1967-01-17
Signal evaluation circuits
US2375044A
(en )
1945-05-01
Selecting system
NO125292B
(en:Method )
1972-08-14
SU433648A1
(ru )
1974-06-25
УСТРОЙСТВО даЯ ПЕРЕДАЧИ СИГНАЛОВ ЧИСЛО-ИШ1УЛЬСНО:"0 КОДАi u>&^.Y'm^
GB641345A
(en )
1950-08-09
Improvements in or relating to teleprinter exchange systems
US2688738A
(en )
1954-09-07
Receiver for remote supervisory and control systems
US3022372A
(en )
1962-02-20
Station selection system
US2534822A
(en )
1950-12-19
Connecting device for telephone exchanges using a register
SU43683A1
(ru )
1935-07-31
Селекторный приемник кодовых сигналов
US1627685A
(en )
1927-05-10
Signaling system
US2887617A
(en )
1959-05-19
Telephone and like signalling systems
US2040691A
(en )
1936-05-12
Selective code receiver
US2879334A
(en )
1959-03-24
Electronic transmitter and receiver for signals in a start-stop code
GB803973A
(en )
1958-11-05
Improvements relating to telephone and like signalling systems
US2153293A
(en )
1939-04-04
Signaling system
GB822218A
(en )
1959-10-21
Improvements in or relating to co-ordinate switching equipment
GB582942A
(en )
1946-12-03
Improvements in or relating to electric signalling systems
US2878305A
(en )
1959-03-17
Book message adapter with number checking