CH218286A
(en )
1941-11-30
Glow electrode for electric discharge tubes.
CH217330A
(en )
1941-10-15
Electric discharge tube with one or more secondary emission electrodes.
CH201099A
(en )
1938-11-15
Electric discharge tube with a secondary emission electrode.
DK58808C
(en )
1941-06-30
Electric Discharge Tube with a Secondary Emission Electrode.
NL51881C
(en )
1942-02-16
Electron tube, provided with a secondary emission electrode
FR821958A
(en )
1937-12-17
Electric discharge tube
DK56194C
(en )
1939-05-22
Electric Discharge Tube with a Secondary Emission Electrode.
DK56347C
(en )
1939-06-26
Electric Discharge Tube with a Secondary Emission Electrode.
DK59049C
(en )
1941-09-22
Electric Discharge Tube with Secondary Emission Electrode.
DK56111C
(en )
1939-05-01
Electric Discharge Tube with Secondary Emission Electrode.
DK56600C
(en )
1939-08-28
Electric Discharge Tube with Secondary Emission Electrode.
DK66090C
(en )
1947-12-22
Electric Discharge Tube with a Secondary Emission Electrode.
FR823347A
(en )
1938-01-18
Electric discharge tube
FR818215A
(en )
1937-09-21
Electric discharge tube
DK57591C
(en )
1940-05-14
Electric Discharge Tube with Photocathode and Grid-shaped Secondary Emission Electrodes.
DK57563C
(en )
1940-05-06
Electric Discharge Tube with Photocathode and Grid-shaped Secondary Emission Electrodes.
CH260192A
(en )
1949-02-28
Electron tube with a secondary emission electrode.
DK56167C
(en )
1939-05-15
System with a gas-filled electric discharge pipe.
AT160166B
(en )
1941-02-25
Electric discharge tube.
FR826169A
(en )
1938-03-24
Electric discharge tube
DK58567C
(en )
1941-04-07
Coupling with a Discharge Tube containing a Secondary Emission Electrode for Gain.
DK58209C
(en )
1940-12-02
Electric Discharge Tube with Acceleration Electrode.
DK57231C
(en )
1940-02-05
Electric Lamp with a Gaseous Discharge Tube.
AU109728B2
(en )
1940-02-10
Improvements in or relating to electric discharge tubes having secondary emission electrodes
IE14188L
(en )
1937-02-06
Illumintion by electric discharge tubes