FR989393A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Rock drilling bit
Assignee: Schoeller Bleckman Stahlwerke AG
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Filing: 1949-06-21
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Granted: 1951-09-07
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Expires: 1969-06-21
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04
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