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FR1120692A
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FR
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Variable magnification optical system
Assignee: Achille-Pierre Dufour
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Filing: 1955-01-28
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Granted: 1956-07-10
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Expires: 1975-01-28
Abstract
No abstract record available.
Inventors
- 👤 Achille-Pierre Dufour
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-08 04:48
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/142
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