CH19987A
(en )
1900-10-31
Electric lamp with filament made of ladders, second class
CH18955A
(en )
1900-04-30
Electric lamp with filament made of ladders, second class
CH19192A
(en )
1900-05-31
Electric lamp with filament made of ladders, second class
CH21067A
(en )
1901-05-15
Lamp with incandescent body made of conductors, second class
CH18567A
(en )
1900-01-31
Electric incandescent lamp with a filament made from second class conductors
ES24698A1
(en )
1899-09-16
Improvements made to incandescent electric lamps.
CH24603A
(en )
1903-01-31
Incandescent lamp with incandescent body made from second class conductors
DK1964C
(en )
1899-01-02
Electric Incandescent.
CH19989A
(en )
1900-10-31
Electric light bulb
CH20820A
(en )
1901-03-31
Electric light bulb
CH18387A
(en )
1899-12-15
Lamp with luminous body made of ladders, second class
DK2095C
(en )
1899-03-13
Filament wires for electric lamps and methods for their manufacture.
CH20581A
(en )
1901-02-28
Ballast resistor for lamps with luminous bodies made of second class conductors
CH15471A
(en )
1898-06-15
Electric light bulb with replaceable filaments
ES22117A1
(en )
1898-02-16
Improvements in incandescent electric lamps.
ES23423A1
(en )
1899-01-01
A new incandescent electric lamp.
CH34544A
(en )
1906-05-15
Electric incandescent lamp with a filament made of tungsten metal
CH21068A
(en )
1901-05-31
Electric light bulb
ES24952A1
(en )
1899-11-16
A luminous body for electric lamps with incandescent elements, made up of second class conductors interspersed in parallel.
CH15183A
(en )
1898-04-30
Electric light bulb
ES24094A1
(en )
1899-05-01
Improvements introduced in electric incandescent lamps.
ES24588A1
(en )
1899-09-01
Improvements in electric lamps.
ES25242A1
(en )
1900-01-15
Improvements in electric lamps.
CH21069A
(en )
1901-05-15
Electric arc lamp
CH21733A
(en )
1901-09-15
Electric arc lamp