CH36978A
(en )
1907-03-31
Raw thread for producing a particularly thin metal thread for electric light bulbs
CH36979A
(en )
1907-03-31
Raw thread for producing a particularly thin metal thread for electric light bulbs
CH36980A
(en )
1907-03-31
Raw thread for producing a particularly thin metal thread for electric light bulbs
CH36561A
(en )
1907-01-31
Device for the production of thin metallic coatings on carbon threads for electric light bulbs
CH38083A
(en )
1907-08-31
Raw thread for producing filaments for electric light bulbs
AT32814B
(en )
1908-05-11
Process for the production of metallic illuminants for electric light bulbs.
AT52743B
(en )
1912-03-26
Process for the production of metal threads for electric light bulbs.
CH43541A
(en )
1909-05-17
Process for the production of metal-containing filaments for electric incandescent lamps
CH38082A
(en )
1907-08-31
Raw filament for making filaments for electric light bulbs
CH36562A
(en )
1907-01-31
Raw filament for electric light bulbs
CH36981A
(en )
1907-03-31
Raw thread for the production of incandescent bodies for electric lamps made of difficult to melt metals
AT33972B
(en )
1908-08-10
Process for the production of filaments for electric light bulbs.
CH37397A
(en )
1907-05-31
Filament for making filaments for electric light bulbs
CH46247A
(en )
1910-02-16
Process for the production of filaments from tungsten metal for incandescent lamps
CH40113A
(en )
1908-06-01
Metal thread for making incandescent bodies for incandescent lamps
AT33759B
(en )
1908-07-25
Process for the production of incandescent mantles for invert gas incandescent light.
AT44666B
(en )
1910-10-25
Process for the production of metallic threads of electric light bulbs.
AT33910B
(en )
1908-08-10
Process for the production of filaments from tungsten or molybdenum for electric light bulbs.
AT30532B
(en )
1907-11-11
Process for the production of filaments from tungsten or molybdenum for electric light bulbs.
AT33909B
(en )
1908-08-10
Process for the production of filaments from tungsten or molybdenum for electric light bulbs.
CH41966A
(en )
1908-12-16
Process for the production of carbon-free incandescent lamp filaments
CH35994A
(en )
1906-11-15
Raw filament for the production of filaments
CH46643A
(en )
1910-04-01
Process for the production of filaments for electric light from a metal of the chromium group
CH45392A
(en )
1909-11-16
Process for the production of incandescent bodies for gas incandescent light
CA140303A
(en )
1912-05-14
Method of making filaments for electric incandescent lamps