Patent FR690257A successfully refreshed from Google Patents.
FR690257A
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Assignee: Rene Grandjean
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Filing: 1930-01-04
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Granted: 1930-09-18
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Expires: 1950-01-04
Abstract
No abstract record available.
Inventors
- 👤 Rene Grandjean
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-27 15:20
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/03; G11B33/00; G11B33/02; G11B33/04; G11B33/0405; G11B33/0461; G11B33/0472
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