DK35714C
(en )
1926-03-01
Discharge tube suitable for tripping a secondary electron emission.
FR587096A
(en )
1925-04-10
Incandescent cathode discharge tube
NL51881C
(en )
1942-02-16
Electron tube, provided with a secondary emission electrode
FR623953A
(en )
1927-07-05
Incandescent cathode for discharge tubes
DK57256C
(en )
1940-02-12
Coupling with a discharge tube, which has a secondary emission electrode for amplifying the anode current.
DK43975C
(en )
1931-04-07
Electron discharge tube.
DK59009C
(en )
1941-09-08
Coupling with a discharge tube, which has a secondary emission electrode for amplifying the anode current.
ES91472A1
(en )
1925-01-16
Discharge tube comprising an incandescent cathode, an anode and a regulation grid.
DK34912C
(en )
1925-08-24
Electric Discharge Tube with Glow Cathode, especially for use as a rectifier.
DK54520C
(en )
1938-03-28
Circuit for Electron Tube Emission Testing.
FR579100A
(en )
1924-10-09
Incandescent cathode discharge tube
FR573663A
(en )
1924-06-27
Incandescent cathode discharge tube
DK36241C
(en )
1926-07-12
Electron discharge tube (Detector tube).
ES89539A1
(en )
1925-02-01
Incandescent cathode for discharge tubes.
ES91182A1
(en )
1924-12-01
Incandescent cathode discharge tubes.
ES77789A1
(en )
1921-06-01
A discharge tube, high vacuum.
DK50795C
(en )
1935-10-21
Oxide cathode, especially for a gaseous discharge tube.
DK61855C
(en )
1944-01-31
Coupling with Discharge Pipe, which has a Secondary Emission Electrode for Amplification of the Anode Current.
DK36246C
(en )
1926-07-19
Electrode for Discharge Tube.
AT96101B
(en )
1924-02-25
Electron tube.
ES117973A1
(en )
1930-07-01
A discharge tube, especially luminous irradiation tube.
DK47696C
(en )
1933-08-28
Electron discharge tube.
ES80748A1
(en )
1922-05-16
A separate discharge tube.
DK58567C
(en )
1941-04-07
Coupling with a Discharge Tube containing a Secondary Emission Electrode for Gain.
DK31060C
(en )
1923-01-02
Anode for Making Perconnections.