DE473970C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Intercepting and screwing device for drill pipes and drill rods
Assignee: Masch & Bohrgeraetefabrik Alf
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Filing: 1925-10-28
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Granted: 1929-03-23
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Expires: 1945-10-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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