CH207043A
(en )
1939-09-15
Pressure telegraph receiver.
DK57409C
(en )
1940-03-26
Detection device for Telephone systems or similar Remote signaling systems.
DK60717C
(en )
1943-03-22
Detection device for Telephone systems or similar Remote signaling systems.
DK58804C
(en )
1941-06-30
Detection device for Telephone systems or similar Remote signaling systems.
DK60533C
(en )
1943-01-25
Detection device for Telephone systems or similar Remote signaling systems.
DK59567C
(en )
1942-03-16
Telephone systems or similar Remote signaling systems.
DK55009C
(en )
1938-07-25
Automatic Central for Telephone systems or similar Remote signaling systems.
CH234264A
(en )
1944-09-15
Telephone system.
DK56914C
(en )
1939-11-13
Impulse repeater for Telephone systems or similar Remote signaling systems.
DK50672C
(en )
1935-09-16
Monitoring device for signaling systems.
DK56800C
(en )
1939-10-16
Telephone systems or similar Remote signaling systems.
DK56689C
(en )
1939-09-18
Telephone systems or similar Remote signaling systems.
DK57488C
(en )
1940-04-15
Telephone systems or similar Remote signaling systems.
DK56280C
(en )
1939-06-12
Telephone systems or similar Remote signaling systems.
DK57067C
(en )
1939-12-27
Demodulator or Modulator for Signaling Systems.
DK50345C
(en )
1935-06-17
Coupling device for automatic Telephone systems.
DK63983C
(en )
1945-10-01
Identification circuit for fully or semi-automatic Telephone systems or similar Remote signaling systems.
DK62379C
(en )
1944-06-26
Remote signaling systems with subscriber identification devices.
DK55367C
(en )
1938-10-24
Telephone systems or similar Remote signaling systems.
ES137124A1
(en )
1935-06-01
An alarm device
DK70263C
(en )
1949-11-28
Telephone systems or similar remote signaling systems.
DK55842C
(en )
1939-02-20
Fully or semi-automatic Telephone system or similar Remote signaling system.
DK54647C
(en )
1938-04-25
Telephone system.
ES136914A1
(en )
1935-05-01
Faucet-valve system.
DK57535C
(en )
1940-04-29
Electrical Signaling System.