FR842265A
(en )
1939-06-08
Incandescent lamp improvements
CH208437A
(en )
1940-01-31
Electric incandescent lamp with a nitrogen gas filling.
DK57962C
(en )
1940-09-09
Electric Incandescent lamp with nitrogen-containing Gaseous filling.
DK54768C
(en )
1938-05-23
Tubular Electric Incandescent Lamp with Gaseous Filling.
FR840688A
(en )
1939-05-02
Base for incandescent electric lamps
DK51627C
(en )
1936-05-11
Electric Bulb with Gaseous Filling.
ES143869A1
(en )
1937-10-01
An electric incandescent lamp filled with gas.
ES136749A1
(en )
1935-05-01
An incandescent electric lamp with gaseous filling.
DK57561C
(en )
1940-05-06
Electric Incandescent Lamp with Fuse.
CH206309A
(en )
1939-07-31
Electric gas-filled incandescent lamp.
IE14563L
(en )
1937-09-06
Electric incandescent lamps
IE15627L
(en )
1939-10-12
Electric discharge-electric incandescent lamp combination
IE15618L
(en )
1939-11-24
Electric incandescent lamps
IE17362L
(en )
1940-01-16
Electric incandescent lamps
DK55736C
(en )
1939-01-23
Incandescent lamp with several incandescent wires.
ES142286A1
(en )
1936-11-01
An electric incandescent lamp filled with gas.
ES126764A1
(en )
1932-06-16
Incandescent electric lamp.
DK53614C
(en )
1937-09-20
Electric incandescent lamp with two incandescent wires.
DK59730C
(en )
1942-05-04
Air-filled electric incandescent lamp with double helical incandescent bulb.
CA364285A
(en )
1937-02-23
Incandescent lamp base
CA365047A
(en )
1937-03-30
Incandescent projecting lamp
CA364734A
(en )
1937-03-16
Incandescent lamp
CA365188A
(en )
1937-04-06
Incandescent lamp
CA365038A
(en )
1937-03-30
Incandescent lamp
CA364736A
(en )
1937-03-16
Incandescent lamp