FR806039A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Drill bit with inserts for the percussion and rotary drilling process
Assignee: GOSOUDARSTVENNYI TSNI INSTITOU
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Filing: 1936-04-08
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Granted: 1936-12-05
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Expires: 1956-04-08
Abstract
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 15:12
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58
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