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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40/00
Photoelectric discharge tubes not involving the ionisation of a gas
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H01J40/16
having photo- emissive cathode, e.g. alkaline photoelectric cell
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H01J40/18
with luminescent coatings for influencing the sensitivity of the tube, e.g. by converting the input wavelength
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