CH260736A
(en )
1949-03-31
Electric discharge lamp.
CH249243A
(en )
1947-06-15
Gas or vapor-filled electric discharge tube.
CH262907A
(en )
1949-07-31
Disc-shaped, indirectly heated cathode for electrical discharge tubes.
CH259587A
(en )
1949-01-31
Electric heating device, in particular for an indirectly heated cathode.
DK71390C
(en )
1950-08-21
Chrome-iron contact means, in particular contact pins, for electric discharge tubes or filament lamps.
CH261759A
(en )
1949-05-31
Contact element on electric discharge tubes and incandescent lamps.
CH248330A
(en )
1947-04-30
Electric discharge tube.
CH293278A
(en )
1953-09-15
Electric discharge tube.
DK79559C
(en )
1955-07-18
Vapor-filled electric discharge lamp, in particular for photographic purposes.
CH262420A
(en )
1949-06-30
Electric discharge tube.
CH269933A
(en )
1950-07-31
Electric discharge tube with an indirectly heated cathode.
CH234242A
(en )
1944-09-15
Electric discharge tube.
CH260194A
(en )
1949-02-28
Electric discharge tube.
CH261760A
(en )
1949-05-31
Electric discharge tube.
DK71790C
(en )
1950-12-04
Ballast impedance for electric discharge tubes for lighting.
DK68442C
(en )
1949-01-24
Electric discharge container, in particular electron tube, with pressed glass plate with lead-through pins.
CH264748A
(en )
1949-10-31
Electric fluorescent tube.
DK66769C
(en )
1948-05-10
Electric Mercury fluorescent lamps, especially for DC operation.
CH249501A
(en )
1947-06-30
Mercury vapor discharge vessel.
ES13155Y
(en )
1947-03-16
Improved electric incandescent lamps.
FR942191A
(en )
1949-02-01
Thermionic lamps, pulsed actuated
CH255255A
(en )
1948-06-15
Bulb.
CH291654A
(en )
1953-06-30
Electric discharge tube.
ES11956Y
(en )
1947-05-01
Electric incandescent lamp, perfected.
DK71491C
(en )
1950-09-18
Electric discharge tube with indirect heated cathode.