FR766412A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements made to hydraulic devices for the extraction, by hydro-suction force, of sands and gold alluvium, precious stones and metals located deep in rivers and marshes
Assignee: Louis Auguste Neviere
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Filing: 1933-10-12
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Granted: 1934-06-28
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Expires: 1953-10-12
Abstract
No abstract record available.
Inventors
- 👤 Louis Auguste Neviere
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-08 20:56
CPC Classifications
E; E21; E21C; E21C50/00
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