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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H01J61/24
Means for obtaining or maintaining the desired pressure within the vessel
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H01J61/26
Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope
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