DK9683C -
Procedure for the production of filaments, consisting of tungsten or molybdenum or alloys of these metals, for electric filament lamps.
- Google Patents
Procedure for the production of filaments, consisting of tungsten or molybdenum or alloys of these metals, for electric filament lamps.
DK9683D
Procedure for the production of filaments, consisting of tungsten or molybdenum or alloys of these metals, for electric filament lamps.
DK9683C
(en)
An incandescent body with its corresponding manufacturing process, for electric incandescent lamps, made of tungsten or molybdenum, or of alloys of these two metals.
An incandescent body with its corresponding manufacturing process, for electric incandescent lamps, made of tungsten or molybdenum, or of alloys of these two metals.