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GEOSTR Corporation Patents |
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Assignee: GEOSTR Corporation
Address: Tokyo, JP
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7004679 |
Easily-cuttable tunnel segment structure |
February 28, 2006 |
| The present invention relates to a novel easily-cuttable tunnel segment structure used for the departure of a shield machine from a main tunnel to a branch tunnel or the return to the main tunnel from the branch tunnel, and provides an easily-cuttable tunnel segment structure 1 const | |
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