BE607288A
(en )
1961-12-18
Cathode heating filament for electronic discharge devices
FR1303449A
(en )
1962-09-07
Direct heated cathode for discharge tube
BE609092A
(en )
1962-04-12
Direct heated cathode for discharge tube
FR1306999A
(en )
1962-10-19
Cold cathode for magnetron
FR1124860A
(en )
1956-10-19
Indirectly heated cathode for electric discharge tube
FR1147654A
(en )
1957-11-28
Tube fitting
FR1204038A
(en )
1960-01-22
Equipotential cathode for discharge tube
FR1303771A
(en )
1962-09-14
Semi-indirect heating cathode for electron tubes
FR1236862A
(en )
1960-07-22
Indirect heating cathode for electron tubes
FR1225314A
(en )
1960-06-30
Indirectly heated cathode for electric discharge tubes
FR1296399A
(en )
1962-06-15
Cathode Heating Filament for Electron Tubes
FR1457177A
(en )
1966-10-28
Indirectly heated cathode for discharge tube
BE619381A
(en )
1962-12-27
Discharge indicator tube
FR1273216A
(en )
1961-10-06
Improvements to indirectly heated cathodes for electron tubes
CH456776A
(en )
1968-07-31
Direct heated cathode for electron tubes
FR1282934A
(en )
1962-01-27
Tube fitting
DK103846C
(en )
1966-02-28
Electric discharge tube for amplification of electric oscillations.
FR1204244A
(en )
1960-01-25
Discharge tube with indirectly heated cathode
FR1136247A
(en )
1957-05-10
Discharge tube with indirectly heated cathode
FR1265355A
(en )
1961-06-30
Indirectly heated cathode
FR1427110A
(en )
1966-02-04
Indirect heating cathode for electronic discharge tubes
FR1309030A
(en )
1962-11-09
Auxiliary Anode Glow Discharge Tube
FR1226931A
(en )
1960-08-18
Indirectly heated cathode
FR1238693A
(en )
1960-08-12
Anode for discharge lamps
FR1284120A
(en )
1962-02-09
Indirectly heated cathode