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Indirectly heated cathode for a gas discharge tube

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
Patent

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Indirectly heated cathode with a thermal absorption layer on...

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
Reexamination Certificate

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Indirectly heated dispenser metal capillary cathode for electric

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
Patent

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Indirectly heated filamentary cathode

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
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Indirectly-heated cathode device for electron tubes

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
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Indirectly-heated cathode heater structure for a cathode ray tub

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
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Industrial hollow cathode

Electric lamp and discharge devices – Electrode and shield structures – Indirectly heated cathodes
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