FR696161A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Device for adjusting the amplification in sound cinematography installations and the like
Assignee: Hans Friess
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Filing: 1930-05-27
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Granted: 1930-12-27
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Expires: 1950-05-27
Abstract
No abstract record available.
Inventors
- 👤 Hans Friess
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 13:49
CPC Classifications
G; G03; G03B; G03B31/00
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