CH210435A
(en )
1940-07-15
Multiple telephone system.
CH212071A
(en )
1940-10-31
System for multiple carrier wave transmission.
CH269949A
(en )
1950-07-31
System for line-bound carrier frequency communication.
CH210933A
(en )
1940-08-15
Antenna system for aircraft.
CH212962A
(en )
1940-12-31
Support device on vehicles.
CH228091A
(en )
1943-07-31
Receiving device for writing telegraph systems.
CH270712A
(en )
1950-09-15
Multiple radio reception system.
CH232468A
(en )
1944-05-31
Type printing telegraph apparatus.
CH215524A
(en )
1941-06-30
Transmission system for simultaneous operation.
CH272711A
(en )
1950-12-31
Messaging system.
CH225892A
(en )
1943-02-28
Monitoring device for two-wire single-current teletype connection lines.
CH209773A
(en )
1940-04-30
Teletype writing device.
CH210928A
(en )
1940-08-15
Circuit device for carrier-frequency communication.
CH202671A
(en )
1939-01-31
Telegraph system.
CH219015A
(en )
1942-01-15
Teleprinter.
CH211738A
(en )
1940-10-15
Type wheel for telegraph receivers.
CH269348A
(en )
1950-06-30
Telegraph exchange system.
DK63205C
(en )
1945-02-26
Telegraph systems in which Signs are transmitted through Interferences.
CH233989A
(en )
1944-08-31
Telegraph device.
DK57984C
(en )
1940-09-16
Telephone system.
CH221465A
(en )
1942-05-31
Receiving arrangement for AC telegraphy.
ES146965A1
(en )
1941-03-01
Improvements in telegraphic systems.
DK58803C
(en )
1941-06-30
Telegraph system.
CH203201A
(en )
1939-02-28
Connection device for bracelets.
CH205031A
(en )
1939-05-31
Telegraph system.