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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2201/00
Electrodes common to discharge tubes
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H01J2201/34
Photoemissive electrodes
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H01J2201/3421
Composition of the emitting surface
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H01J2201/3426
Alkaline metal compounds, e.g. Na-K-Sb
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