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PCE
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CPC Subgroup
H01J 19/10

characterised by the shape

Full Title

Details of vacuum tubes of the types covered by group H01J21/00 > Electron-emitting electrodes; Cathodes > Thermionic cathodes > characterised by the shape

1 direct subcode

Child Classifications

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  • H01J 19/12 Supports; Vibration-damping arrangements