FR754773A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Protective device for thermionic tubes and similar tubes
Assignee: NAAMLOOZE VENNOOTSCHAP THERMIO
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Filing: 1933-04-26
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Granted: 1933-11-14
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Expires: 1953-04-26
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 21:49
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/12
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