GB1459672A
(en )
1976-12-22
Signal duration sensitive circuit
ES382892A1
(es )
1972-12-16
Perfeccionamientos en circuitos activadores para receptoresde television.
GB948568A
(en )
1964-02-05
System for detecting transpositions of elements within a pulse signal
GB938169A
(enrdf_load_stackoverflow )
AU262243B2
(en )
1963-09-12
Improvements in or relating to rhythmic telegraph systems ofthe kind having automatic signalling of mutilated incoming signals
GB1064543A
(en )
1967-04-05
Improvements in or relating to electrical signalling systems
AU1525062A
(en )
1963-09-12
Improvements in or relating to rhythmic telegraph systems ofthe kind having automatic signalling of mutilated incoming signals
GB996835A
(en )
1965-06-30
Multi-frequency code signalling method
CA677734A
(en )
1964-01-07
Multiparty telephone signalling system employing transistors
AU252881B2
(en )
1963-03-07
Communication systems having means for detecting faulty telegraph signals
GB980155A
(enrdf_load_stackoverflow )
1965-01-13
FR2291554A1
(fr )
1976-06-11
Dispositif antivol avec transmission radioelectrique en cas d'effraction
AU220561A
(en )
1963-03-07
Communication systems having means for detecting faulty telegraph signals
ES387708A1
(es )
1973-05-16
Procedimiento y dispositivo para el desacoplamiento yno se-paracion de senales en una linea telefonica de abonado.
JPS5393712A
(en )
1978-08-17
Malfunction preventing circuit for signal receiver
CA700011A
(en )
1964-12-15
Call awaiting signal telephone circuits
AU256941B2
(en )
1963-06-20
Improvements in vehicle actuated traffic signal systems
CA809749A
(en )
1969-04-01
Key telephone system signaling circuit
GB1025326A
(en )
1966-04-06
Electric voltage signal receiver
GB1166970A
(en )
1969-10-15
Improvements in or relating to Signal Receivers
CA604241A
(en )
1960-08-30
Telephone signalling systems
GB823874A
(en )
1959-11-18
Improvements in or relating to pulse distortion detecting equipment
AU1251061A
(en )
1963-06-20
Improvements in vehicle actuated traffic signal systems
CA694870A
(en )
1964-09-22
Multifrequency signal receiver
CA696057A
(en )
1964-10-13
Multifrequency signal receiver