NL156540B
(en )
ELECTRIC LIGHT BULB.
DK83108C
(en )
1957-07-08
Circuit arrangement for adjusting the brightness of fluorescent lamps with heating electrode.
FR1026821A
(en )
1953-05-05
Electroluminescent lamps
DK74878C
(en )
1952-10-27
Installation with one or more fluorescent lamps.
ES20726Y
(en )
1950-01-01
Fluorescent lighting lamp.
DK74985C
(en )
1952-11-17
Electric incandescent lamp with power bridge.
DK75087C
(en )
1952-12-08
Electric discharge tube with fluorescent coating.
DK75878C
(en )
1953-05-26
Luminaire for fluorescent lamps.
DK74942C
(en )
1952-11-10
Electric high pressure metal vapor discharge lamp with color correction.
GR12226B
(en )
1949-10-31
ELECTRIC LIGHTING LAMPS WITH MORE THAN ONE WHITE FIBER.
ES21544Y
(en )
1950-05-16
Lighting lamp.
DK75213C
(en )
1952-12-29
Socket for fluorescent lamps with end-mounted pin base.
ES20572Y
(en )
1950-01-01
Dimmable lamp.
ES16984Y
(en )
1948-12-16
Screen for fluorescent lighting.
DK73111C
(en )
1951-09-24
Systems with fluorescent lamps that are fed with alternating current.
DK69536C
(en )
1949-07-11
Fluorescent electric discharge lamp with helical discharge path.
AT171983B
(en )
1952-07-25
Gas discharge lamp with discharge heated glow cathode
DK71823C
(en )
1950-12-11
Luminaire for fluorescent lamps.
DK74851C
(en )
1952-10-20
Electric incandescent lamp with internal shade.
DK78170C
(en )
1954-09-27
Systems for slow connection of electrical devices such as incandescent lamps.
ES17240Y
(en )
1949-01-01
Fluorescent lighting fixture.
ES188385A1
(en )
1949-09-01
APPLIANCE FOR FLUORESCENT LIGHTING
ES28366Y
(en )
1958-04-01
Improved electrical circuit, designed to produce the instantaneous ignition of fluorescent lamps
DK70367C
(en )
1949-12-19
System with an electric discharge lamp.
DK76332C
(en )
1953-09-07
Foil melting for electric lamps.