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FR558087A
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Heat ray selectors for projectors
Assignee: Rodolphe Berthon
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Filing: 1922-03-02
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Granted: 1923-08-21
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Expires: 1942-03-02
Abstract
No abstract record available.
Inventors
- 👤 Rodolphe Berthon
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 12:24
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
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