FR775464A
(en )
1934-12-28
Improvements to incandescent electric lamps
FR800793A
(en )
1936-07-18
Electric lamps
DK53614C
(en )
1937-09-20
Electric incandescent lamp with two incandescent wires.
FR796006A
(en )
1936-03-27
Improvements to electric lamps
FR801118A
(en )
1936-07-28
Improvements to incandescent electric lamps
FR757340A
(en )
1933-12-22
Improvements to incandescent electric lamps
FR785139A
(en )
1935-08-02
Improvements to incandescent electric lamps
ES135953A1
(en )
1935-02-16
Improvement in the manufacture of electric incandescent lamps.
ES3076Y
(en )
1935-06-01
New electric incandescent lamp.
ES134164A1
(en )
1934-07-16
Improvements in the manufacture of incandescent electric lamps.
DK55736C
(en )
1939-01-23
Incandescent lamp with several incandescent wires.
DK56000C
(en )
1939-04-03
Electric Bulb.
ES130793A1
(en )
1933-07-16
Improvements in the manufacture of incandescent electric lamps.
ES133749A3
(en )
1934-04-16
Improvements in electric incandescent lamps.
FR763213A
(en )
1934-04-25
Improvements to incandescent electric lamps
FR782575A
(en )
1935-06-07
Electric lamp socket
ES134038A1
(en )
1934-07-16
Improvements in the manufacture of electric lamps.
ES136976A3
(en )
1935-06-16
Improvements in the manufacture of electric incandescent lamps.
IE13627L
(en )
1935-04-03
Electric incandescent lamps
FR798771A
(en )
1936-05-26
Improvements to electric lamps
FI17242A
(en )
1936-11-20
Gasfylld electric light bulb
ES136234A1
(en )
1935-01-16
An electric incandescent lamp.
DK53228C
(en )
1937-06-21
Electric Lamp.
DK51627C
(en )
1936-05-11
Electric Bulb with Gaseous Filling.
ES126764A1
(en )
1932-06-16
Incandescent electric lamp.