Patent DE830335C successfully refreshed from Google Patents.
DE830335C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Drilling mining equipment, especially for lignite
Assignee: BRAUNKOHLEN und BRIKETWERKE RO
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Filing: 1951-01-09
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Granted: 1952-02-04
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Expires: 1971-01-09
Abstract
No abstract record available.
Inventors
- 👤 Dipl-Berging Johann Janke
- 👤 Adolf Poths
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-07 06:31
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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