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DE717994C
Expired / Lapsed
DE
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Drilling device with drill pot that can be moved up and down on the drill rod by pulling cords
Assignee: GEORG WELLMANN
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Filing: 1940-04-11
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Granted: 1942-02-27
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Expires: 1960-04-11
Abstract
No abstract record available.
Inventors
- 👤 Georg Wellmann
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-06 14:40
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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