FR804286A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Flat chisel for rotary drilling process
Assignee: PREUSSISCHE BERGWERKS und HUET
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Filing: 1936-03-24
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Granted: 1936-10-20
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Expires: 1956-03-24
Abstract
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-24 15:29
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/54
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