Patent FR557114A successfully refreshed from Google Patents.
FR557114A
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FR
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Improvements to electrical transmission systems for signals and the like using high frequency currents along power lines
Assignee: Joseph Bethenod
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Filing: 1922-02-02
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Granted: 1923-08-03
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Expires: 1942-02-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph Bethenod
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H04B3/56; H04B2203/00; H04B2203/54; H04B2203/5462; H04B2203/5466; H04B2203/5483; H04B2203/5491
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References Cited (Backward Citations)
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