Patent FR998475A successfully refreshed from Google Patents.
FR998475A
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Method and apparatus for standby indicators, particularly for telephone communications
Assignee: FR D ETUDES ET DE LANCEMENT PU
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Filing: 1945-10-09
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Granted: 1952-01-18
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Expires: 1965-10-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 12:42
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/428; H04M3/4285
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