FR48790E
(en )
1938-06-23
Electric mercury vapor discharge lamp with rare gas base filling
FR842065A
(en )
1939-06-05
Electric vapor discharge lamp, high pressure, with quartz container
FR47662E
(en )
1937-06-16
Mercury vapor discharge tube with artificial cooling
DK55580C
(en )
1938-12-19
Electric mercury vapor discharge lamp with a basic filling consisting of a noble gas.
CH208846A
(en )
1940-02-29
Electric high pressure mercury vapor lamp with fixed glow electrodes.
FR803058A
(en )
1936-09-22
Mercury vapor electric discharge tube
DK58448C
(en )
1941-02-24
Electric Mercury vapor discharge lamp.
DK58047C
(en )
1940-10-07
Electric Lamp with a High Pressure Mercury Vapor Discharge Tube.
DK56254C
(en )
1939-06-06
Electric Mercury vapor discharge lamp.
DK57068C
(en )
1939-12-27
Electric Mercury vapor discharge lamp.
ES140249A1
(en )
1936-01-16
A mounting arrangement with a discharge lamp filled with gas.
FR814978A
(en )
1937-07-03
Mercury vapor lamp
DK56743C
(en )
1939-10-02
Electric Lamp with a High Pressure Metal Vapor Discharge Tube.
DK55143C
(en )
1938-08-29
Electric Lamp with a High Pressure Metal Vapor Discharge Tube.
FR850606A
(en )
1939-12-21
High pressure mercury vapor electric lamp
FR813247A
(en )
1937-05-28
Improvements to electric discharge lamps
FR811846A
(en )
1937-04-23
Improvements to electric discharge lamps
ES135613A1
(en )
1934-11-16
A mounting with an electric discharge lamp filled with gas.
ES137410A1
(en )
1935-06-16
A discharge lamp with mercury vapor refrigerated artificially.
DK54580C
(en )
1938-04-11
Electric Discharge Lamp.
DK56225C
(en )
1939-05-30
Electric Metal Vapor Discharge Lamp.
DK57017C
(en )
1939-12-11
Electric Lamp with at least one High-pressure mercury vapor discharge tube.
DK57231C
(en )
1940-02-05
Electric Lamp with a Gaseous Discharge Tube.
FR809018A
(en )
1937-02-22
High pressure mercury electric lamp
FR803280A
(en )
1936-09-26
Mercury vapor discharge tube