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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23/00
Details of transit-time tubes of the types covered by group H01J25/00
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H01J23/02
Electrodes; Magnetic control means; Screens
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H01J23/08
Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
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H01J23/083
Electrostatic focusing arrangements
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