Patent JPS554452A successfully refreshed from Google Patents.
JPS554452A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Method and device for shieldinggtype excavation of tunnel
Assignee: Kumagai Gumi Co Ltd
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Filing: 1978-06-27
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Granted: —
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Expires: 1998-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ikujirou Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-11-03 13:20
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/12; E21D9/124; E21D9/06; E21D9/08; E21D9/0875; E21D9/0879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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