FR558977A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Filter device for alternating currents
Assignee: TELEPHONES SOC IND
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Filing: 1922-11-22
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Granted: 1923-09-07
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Expires: 1942-11-22
Abstract
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Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 11:52
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0115
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