FR370853A
Expired / Lapsed
FR
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Optical device allowing observation under cover
Assignee: Individual
•
Filing: 1906-10-26
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Granted: 1907-02-21
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Expires: 1926-10-26
Abstract
No abstract record available.
Inventors
- 👤 Achille Daubresse
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 06:27
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/08
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Total Claims: 0
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References Cited (Backward Citations)
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