DE497231C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Rock drill for impact drills, the cutting head of which is provided with a nut thread and is screwed directly onto the end part of the drill rod provided with a screw thread
Assignee: Individual
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Filing: —
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Granted: 1930-05-05
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Expires: 1947-05-05
Abstract
No abstract record available.
Inventors
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Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-23 03:53
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042
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