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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H01J21/02
Tubes with a single discharge path
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H01J21/06
having electrostatic control means only
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H01J21/10
with one or more immovable internal control electrodes, e.g. triode, pentode, octode
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