FR985935A
Expired / Lapsed
FR
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Devices for automatically maintaining constant the quantity of light received on a surface
Assignee: Jean-Rene-Marie Girard
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Filing: 1943-11-13
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Granted: 1951-07-25
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Expires: 1963-11-13
Abstract
No abstract record available.
Inventors
- 👤 Jean-Rene-Marie Girard
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 06:24
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
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