CH269659A
(en )
1950-07-15
Telegraph system.
CH254957A
(en )
1948-05-31
Selective electrical signal receiver.
CH279787A
(en )
1951-12-15
Selection device for telecommunications installation.
DK64128C
(en )
1945-12-03
Electrical System for Transmitting Signals through a Line.
DK66625C
(en )
1948-04-19
Fully or semi-automatic Remote Signaling System.
CH289854A
(en )
1953-03-31
Automatic telephone installation.
CH276280A
(en )
1951-06-30
Automatic telecommunication installation.
DK110020C
(en )
1968-08-26
Communication systems for transmitting signals.
CH225892A
(en )
1943-02-28
Monitoring device for two-wire single-current teletype connection lines.
DK69668C
(en )
1949-07-25
Coupling for transmitting signals by current pulses.
CH235152A
(en )
1944-11-15
Two-way communication system.
DK58408C
(en )
1941-02-10
Transmission systems for electrical signals.
DK58158C
(en )
1940-11-11
Device for sending alarm signals.
DK75511C
(en )
1953-03-02
Signaling connection for telephone systems.
DK73644C
(en )
1952-01-14
Multiplex carrier signaling system.
DK59271C
(en )
1941-12-08
Transmission systems for electrical signals.
CH283596A
(en )
1952-06-15
Automatic telegraph installation.
DK75692C
(en )
1953-04-13
Electrical signaling system.
DK70713C
(en )
1950-03-13
Impulse repeater for electrical signal systems.
DK63889C
(en )
1945-09-03
Relay controlled Selector for electrical connection systems, especially automatic telephone systems.
DK64479C
(en )
1946-05-13
Remote signaling control system.
ES147890A1
(en )
1941-10-01
A telegraph system.
DK63377C
(en )
1945-04-16
Pupinized Remote Message Cable, especially Submarine Cable.
GR9520B
(en )
1941-05-24
AUTOMATIC TELEPHONE TRANSMITTER.
DK63087C
(en )
1945-01-08
Coupling box for cable installations.