KR890009128A
(ko )
1989-07-15
통신제어 시스템
GB1459672A
(en )
1976-12-22
Signal duration sensitive circuit
GB998083A
(en )
1965-07-14
Multi-frequency code receiving device with speech-immunity receivers
ES382892A1
(es )
1972-12-16
Perfeccionamientos en circuitos activadores para receptoresde television.
GB1105427A
(https= )
1968-03-06
GB948568A
(en )
1964-02-05
System for detecting transpositions of elements within a pulse signal
GB938169A
(https= )
AU262243B2
(en )
1963-09-12
Improvements in or relating to rhythmic telegraph systems ofthe kind having automatic signalling of mutilated incoming signals
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
AU252881B2
(en )
1963-03-07
Communication systems having means for detecting faulty telegraph signals
GB980155A
(https= )
1965-01-13
FR2291554A1
(fr )
1976-06-11
Dispositif antivol avec transmission radioelectrique en cas d'effraction
GB852193A
(en )
1960-10-26
Improvements in or relating to burglar alarm systems
AU220561A
(en )
1963-03-07
Communication systems having means for detecting faulty telegraph signals
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
CA690729A
(en )
1964-07-14
Voice-frequency signal receivers as used in telephone systems
CA809749A
(en )
1969-04-01
Key telephone system signaling circuit
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
CA696057A
(en )
1964-10-13
Multifrequency signal receiver