Patent FR391900A successfully refreshed from Google Patents.
FR391900A
Expired / Lapsed
FR
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Process for continuous extraction in mines, quarries and similar operations, by means of endless cables or chains, or other similar devices
Assignee: Individual
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Filing: 1908-06-03
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Granted: 1908-11-11
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Expires: 1928-06-03
Abstract
No abstract record available.
Inventors
- 👤 Hubert Valentin Neukirch
- 👤 Ernst Emil Freytag
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-07 05:24
CPC Classifications
E; E21; E21C; E21C41/00; E21C41/16; E21C41/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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