FR510255A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Electrical apparatus operating an air turbine, a shutter and a circuit breaker; allowing fixed projection with cinematographic films, whatever the heat intensity of the light source, and obtaining the non-flammability of the films whatever the duration of their exposure in front of the light source
Assignee: JEAN JOSEPH DE WIT
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Filing: 1920-01-12
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Granted: 1920-11-30
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Expires: 1940-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jean-Joseph De Wit
- 👤 Virgilio Gionne
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-31 15:01
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
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