Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01J
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
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61/00
Gas-discharge or vapour-discharge lamps
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H01J61/84
Lamps with discharge constricted by high pressure
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H01J61/86
with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
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