FR728181A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Brick for lining the upper surface of tunnels
Assignee: BIRKENFELDER TON und ZIEGELWER
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Filing: 1931-12-12
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Granted: 1932-06-30
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Expires: 1951-12-12
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
2026-11-07 18:14
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/04; E21D11/06
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