Patent DE13032C successfully refreshed from Google Patents.
DE13032C
Active / In Force
DE
Innovations to the apparatus used in rock tunnel construction
Assignee: H. N. PENRICE in Hatfield (England)
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Filing: —
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Granted: —
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Expires: —
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-26 07:04
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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