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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H01J2201/304
Field emission cathodes
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H01J2201/30403
characterised by the emitter shape
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H01J2201/30407
Microengineered point emitters
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H01J2201/30415
needle shaped
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