Improvements in the construction of underground tunnels and rock chambers
IL46208A0Inactive Publication Date: 1975-03-13ISRAEL ALTERMAN +1
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Patent Information
- Application Number
- IL46208
- Authority / Receiving Office
- IL · IL
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 1974-12-09
- Publication Date
- 1975-03-13
- Estimated Expiration
- Not applicable · inactive patent
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