DK35709C
(en )
1926-03-01
Procedure for receiving wireless signals and for high frequency telephony on wires by cathode tubes.
DK33216C
(en )
1924-05-19
Procedure for Pupinizing High Frequency Telephone Cables.
DK33136C
(en )
1924-04-28
Connecting device for multiplex telegraphy and multiplex telephony with high frequency on wires.
DK32296C
(en )
1923-09-24
Audio receiver for wireless Telegraphy and Telephony.
DK32036C
(en )
1923-07-30
Device for Antennas for Wireless Telegraphy and Telephony.
DK36706C
(en )
1926-10-25
Device for multiple High Frequency Telephony or High Frequency Telegraphy on Wires.
AT108042B
(en )
1927-11-25
Amplifier tube for wireless telephony.
ES77732A1
(en )
1921-07-16
Cathode tube transmitter for telephony with high frequency vibrations.
DK34920C
(en )
1925-08-31
Procedure for Pupinizing Telephone Cords Using Single Coils.
DK32940C
(en )
1924-03-10
Procedure for Receiving Wireless Signals.
ES77275A1
(en )
1921-04-16
Provision of connections for exchanges with subscriber networks for high frequency telephony.
DK33234C
(en )
1924-05-19
Cathode capable of emitting electrons, and Procedure for Manufacturing the Cathode.
ES92225A1
(en )
1925-07-01
An over-the-table telephone station.
DK37103C
(en )
1927-02-07
Amplifier system for high frequency electrical oscillations.
DK33125C
(en )
1924-04-22
Transmission system for High Frequency Telegraphy and the like.
DK33659C
(en )
1924-09-15
High frequency signal system.
DK53933C
(en )
1937-11-29
Amplifier for high frequency electrical oscillations.
CA216502A
(en )
1922-03-07
Receiving system for wireless telegraphy and telephony
DK36531C
(en )
1926-09-13
Radio high frequency transformer.
DK37586C
(en )
1927-06-13
Electron Discharge Apparatus and Method for Manufacturing Its Anode.
CA253063A
(en )
1925-08-25
Voice frequency carrier telegraph
DK34092C
(en )
1925-02-02
Procedure for the production of ferro-chromium and other ferro-alloys.
ES78693A1
(en )
1921-09-16
An improved procedure, and its corresponding apparatus, for the reception of signals by wireless telegraphy.
FR597307A
(en )
1925-11-18
Membrane for telephone receiver
DK34949C
(en )
1925-08-31
Device for Improving the Efficiency of Frequency Multiplication Transformers.