CH90630A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Process for sealing, securing and strengthening shafts and tunnels in loose rock layers.
Assignee: August Wolfsholz Presszementba
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Filing: 1920-12-20
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Granted: —
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Expires: 1940-12-20
Abstract
No abstract record available.
Inventors
- 👤 Act-Ges August Presszementbau
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/04; E21D20/00; E21D20/02
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