FR922051A
(en )
1947-05-28
Electric discharge lamps
FR922052A
(en )
1947-05-28
Advanced discharge electric lamps
FR943372A
(en )
1949-03-07
Discharge tube
CH249243A
(en )
1947-06-15
Gas or vapor-filled electric discharge tube.
FR922967A
(en )
1947-06-24
Electric discharge lamps
FR943009A
(en )
1949-02-24
Discharge tube
DK68482C
(en )
1949-01-31
Electron discharge tube with glass base and fused contact pins.
FR947275A
(en )
1949-06-28
Electron tube devices
FR922371A
(en )
1947-06-06
Electric discharge lamps
FR952893A
(en )
1949-11-25
Electronic discharge tubes
CH248942A
(en )
1947-05-31
Mercury contact tube.
CH248330A
(en )
1947-04-30
Electric discharge tube.
CH246442A
(en )
1947-01-15
Glass melting furnace.
FR937868A
(en )
1948-08-30
Improvements in the manufacture of electronic discharge lamp bases and tubes
CH241775A
(en )
1946-03-31
Electric discharge tube.
DK73705C
(en )
1952-01-28
Multi-branched mercury contact tube.
DK66043C
(en )
1947-12-15
Ion discharge tube with Mercury cathode and floating igniter.
CH248328A
(en )
1947-04-30
Mercury contact tube.
FR990133A
(en )
1951-09-18
Electric discharge tubes
FR922966A
(en )
1947-06-24
Advanced discharge lamp
DK67511C
(en )
1948-08-30
Discharge tube with Mercury cathode and submerged Ignition Electrode.
FR993996A
(en )
1951-11-09
Conductive liquid circuit breaker, in particular mercury
FR54445E
(en )
1950-05-02
Improvements in the manufacture of electric lamps
DK67601C
(en )
1948-09-13
Electric discharge tube with a fluorescent substance and method of manufacturing the fluorescent substance.
DK68442C
(en )
1949-01-24
Electric discharge container, in particular electron tube, with pressed glass plate with lead-through pins.