FR452623A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Hearing protection against the noise of explosions
Assignee: Individual
•
Filing: 1912-11-04
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Granted: 1913-05-20
•
Expires: 1932-11-04
Abstract
No abstract record available.
Inventors
- 👤 Harry Francis Kalse
- 👤 John Gerrard Kalse
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 15:00
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/14
Claims Analysis
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References Cited (Backward Citations)
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