CH291990A
(en )
1953-07-31
Automatic separation system.
CH321711A
(en )
1957-05-15
Automatic telephone exchange system
CH275635A
(en )
1951-05-31
Automatic telephone registration system.
CH312455A
(en )
1955-12-31
Telecommunication system.
CH304196A
(en )
1954-12-31
Telephone system with subscriber set.
CH276568A
(en )
1951-07-15
Subscriber circuit in an automatic telephone system.
DK76744C
(en )
1953-11-30
Coupling for monitoring subscribers' counters in automatic signaling systems.
DK80186C
(en )
1955-11-28
Coupling for use in automatic signaling systems.
DK76852C
(en )
1953-12-21
Coupling for use in automatic signaling systems for switching on a device.
DK74982C
(en )
1952-11-17
Coupling for use in automatic signaling systems.
DK80791C
(en )
1956-04-03
Coupling for use automatic signaling systems for testing impedances.
DK77276C
(en )
1954-03-22
Coupling to automatic telephone exchanges for sending out automatically repeated ringtones.
CH294194A
(en )
1953-10-31
Automatic alarm device.
DK79201C
(en )
1955-05-02
Automatic remote signaling system with means for telephone guard.
DK93628C
(en )
1962-06-12
Automatic signaling system.
DK85951C
(en )
1958-07-28
Automatic signaling system.
DK84151C
(en )
1957-12-30
Control coupling for use in automatic signaling systems.
DK79488C
(en )
1955-07-04
Selector system for automatic signaling systems.
FR1036728A
(en )
1953-09-10
Selective signaling system intended in particular for automatic telephony
DK92029C
(en )
1961-10-23
Signaling equipment for use in an automatic telecommunication center.
IE19496L
(en )
1948-11-09
Automatic exchange systems.
DK80185C
(en )
1955-11-28
Coupling for use in automatic telephone systems.
DK80631C
(en )
1956-03-05
Coupling device for through traffic in teletypewriter systems with selector operation.
DK77096C
(en )
1954-02-15
Control device for use in automatic signaling systems.
IE21543L
(en )
1951-07-16
Automatic telephone exchange systems