CH406322A
(en )
1966-01-31
Time division multiplex switching system with a four-wire multiplex bus containing a repeater device
NL146018B
(en )
1975-05-15
TIME MULTIPLEX TELEPHONE SYSTEM WITH LINE CONCENTRATORS.
FI40140C
(en )
1968-10-10
Anordning for maneuvering av i sicksack sammanvikbara lastrumsluckor
NL142556B
(en )
1974-06-17
TELEPHONE SWITCHING SYSTEM WITH PBX CENTRALS.
FI35984A
(en )
1966-06-10
Maneuvering for a multiplex telephone exchange system
FI36298A
(en )
1966-10-10
Copy for a multiplex telephone system
NL143394B
(en )
1974-09-16
COMMUNICATION SYSTEM.
CA650695A
(en )
1962-10-23
Party-line telephone system
FI35982A
(en )
1966-06-10
Tidsmultiplex telephone exchange system
FI35983A
(en )
1966-06-10
Tidsmultiplex telephone exchange system
AU254689B2
(en )
1963-05-02
A time-division multiplex communication system
AU252175B2
(en )
1963-05-02
Time division multiplex communication system
AU277903B2
(en )
1964-12-03
Improvements relating to automate telephone exchange systems
DK107881C
(en )
1967-07-17
Coupling to telecommunication systems.
AU277945B2
(en )
1964-10-29
Improvements relating to automatic telephone exchange system
CA616403A
(en )
1961-03-14
Crossbar relay private branch exchange telephone system
AU253092B2
(en )
1963-05-02
Improvements intime-division multiplex communication systems
AU252269B2
(en )
1963-05-02
Improvements intime-division multiplex communication systems
AU550161A
(en )
1963-05-02
A time-division multiplex communication system
CA632741A
(en )
1961-12-12
Selective calling system
AU284148B2
(en )
1966-06-09
Telephone transfer system
AU550461A
(en )
1963-05-02
Time division multiplex communication system
AU3130663A
(en )
1964-12-03
Improvements relating to automate telephone exchange systems
CA625760A
(en )
1961-08-15
Time division multiplex system
CA621614A
(en )
1961-06-06
Telephone system