CH344133A
(en )
1960-01-31
Low pressure mercury vapor discharge lamp
CH344139A
(en )
1960-01-31
Supply cathode for electric discharge tubes
CH340280A
(en )
1959-08-15
Electric discharge tube with a directly heatable cathode
CH364837A
(en )
1962-10-15
Tubular electric discharge lamp
CH336502A
(en )
1959-02-28
Sodium Vapor Discharge Tube
AT194982B
(en )
1958-01-25
Electric discharge tube filled with mercury vapor
CH312426A
(en )
1955-12-31
Electric discharge tube.
CH339294A
(en )
1959-06-30
Electric discharge lamp
AT198374B
(en )
1958-06-25
Switching arrangement for electric discharge tubes
CH389788A
(en )
1965-03-31
Electric discharge tube with hot cathode
CH342296A
(en )
1959-11-15
Electric cold cathode gas discharge tube
CH366068A
(en )
1962-12-15
Electric discharge tube with a screen
AT206526B
(en )
1959-12-10
Holding device for electric discharge tubes
CH342647A
(en )
1959-11-30
Electric lamp or discharge tube
FR1147591A
(en )
1957-11-27
Electric discharge tube
CH333695A
(en )
1958-10-31
Current lead-in at the glow discharge vessel
AT192502B
(en )
1957-10-25
Electric light bulb
AT194005B
(en )
1957-12-27
Electric lamp or discharge tube
AT176614B
(en )
1953-11-10
Electric discharge tube
AT197484B
(en )
1958-04-25
Electric incandescent lamp or discharge tube
AT196007B
(en )
1958-02-25
Electric incandescent lamp or discharge tube
CH366906A
(en )
1963-01-31
Electric discharge tube with an indirectly heatable cathode
AT181668B
(en )
1955-04-12
Electric discharge tube
CH320559A
(en )
1957-03-31
Gas or vapor filled electrical discharge vessel with auxiliary discharge path
CH387178A
(en )
1965-01-31
Electric discharge tube with indirectly heated cathode