Patent FR679386A successfully refreshed from Google Patents.
FR679386A
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Device for automatically maintaining, inside an enclosure, a determined pressure despite variations in the external pressure
Assignee: ANCIENS LEON MA Ets
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Filing: 1928-12-13
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Granted: 1930-04-11
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Expires: 1948-12-13
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 09:03
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02
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