FR1262151A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Method and device for taking samples by deep drilling in coal mines
Assignee: Nikex Nehezipari Kulkereskedelmi Vallalat
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Filing: 1960-06-24
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Granted: 1961-05-26
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Expires: 1980-06-24
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
2026-11-04 22:06
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/005; E21B21/00; E21B21/12; E21B21/14
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