FR782553A
(en )
1935-06-07
Automatic telephone system
DK49463C
(en )
1934-10-29
Device for Telephone Systems for Receiving AC Pulses.
DK50145C
(en )
1935-04-15
Device for automatic telephone systems.
CH234264A
(en )
1944-09-15
Telephone system.
DK48473C
(en )
1934-03-05
Device for automatic telephone systems.
DK50345C
(en )
1935-06-17
Coupling device for automatic Telephone systems.
DK49578C
(en )
1934-11-26
Coupling device for automatic Telephone systems.
DK50376C
(en )
1935-07-01
Coupling device for automatic Telephone systems.
DK50510C
(en )
1935-08-05
Coupling device for automatic Telephone systems.
DK46794C
(en )
1933-01-23
Device for Controlling the Coupling Process at Telephone Systems Using AC Pulses.
DK50037C
(en )
1935-03-25
Device for electric ring systems.
DK47955C
(en )
1933-10-30
Device for Automatic Telephone Systems with Registers.
DK52539C
(en )
1937-01-11
Impulse transmitter, preferably for Use in Automatic Telephone Systems.
DK53821C
(en )
1937-11-08
Coin apparatus for Telephone systems.
DK46793C
(en )
1933-01-23
Device for Checking the Coupling Process at Telephone Systems.
DK53928C
(en )
1937-11-29
Telephone system.
DK46505C
(en )
1932-11-21
Device for Operating Telephone Interconnection Centers.
DK57656C
(en )
1940-06-03
Coupling device at Telephone system.
DK52423C
(en )
1936-12-14
Synchronization device for Telegraph Devices.
DK47989C
(en )
1933-11-06
Automatic Telephone System.
DK51084C
(en )
1935-12-30
Altitude device for firearms.
DK49705C
(en )
1934-12-27
Procedure for Processing Wool.
DK47953C
(en )
1933-10-30
Device for desk telephones.
DK49034C
(en )
1934-07-23
Device for Mixing AC Voltages.
DK55732C
(en )
1939-01-23
Fully or semi-automatic Telephone System.