DK21067C
(en )
1916-03-06
Electric Lamp with Glowing Gases.
DK20323C
(en )
1915-07-05
Electric Lamp with Glowing Gases.
DK20559C
(en )
1915-09-13
Electric Lamp with luminous Gases.
DK16965C
(en )
1913-02-10
Self-igniting electric arc lamp.
DK20975C
(en )
1916-02-07
Electric lamp with incandescent gases and procedure for its manufacture.
GB191310892A
(en )
1914-04-23
Means for Improving the Illuminating Effect of Incandescent Electric Lamps.
ES55068A3
(en )
1913-05-01
Improvements in electric incandescent lamps.
CH68402A
(en )
1915-03-16
Electric gas lamp
CH70341A
(en )
1915-09-16
Electric gas lamp
FR474519A
(en )
1915-02-24
Improvements to incandescent electric lamps
ES52980A1
(en )
1912-07-16
Improvements in incandescent electric lamps.
CH69454A
(en )
1915-06-16
Acetylene lamp
DK17366C
(en )
1913-06-02
Device for electric arc lamps with several series-connected carbon pairs.
ES54339A1
(en )
1913-01-01
Improvements in electric incandescent lamps.
ES58735A1
(en )
1914-08-16
Improvements in electric gas lamps.
ES58235A1
(en )
1914-07-01
Improvements in electric gas lamps.
ES58236A1
(en )
1914-07-01
Improvements in electric gas lamps.
ES58237A1
(en )
1914-07-01
Improvements in electric gas lamps.
FR470744A
(en )
1914-09-26
Improvements relating to incandescent electric lamps
DK19358C
(en )
1914-10-19
Electric Bulb Socket with Switch.
FR471259A
(en )
1914-10-21
Electric lamps
DK11739C
(en )
1909-01-25
Electric Arc lamp with upward facing arc.
NL4105C
(en )
1914-09-10
Electric carbon filament bulb with gas filling
CH67865A
(en )
1915-01-16
Gas cooker
FR475876A
(en )
1915-06-21
Incandescent electric lamp with gas filling