MITSUBISHI HEAVY INDUSTRIES TUNNELING MACHINERY & GEOTECHNOLOGY CO., LTD.
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Feb 19, 2002 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 15 Total Citation Count
- Apr 26, 1990 Earliest Filing
- 3 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
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Recent Publications
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Recent Patents
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
6347838 Method for replacing cutters of tunnel-excavating machine, method for excavating tunnel, and tunnel excavating machineExpiredJul 13, 00Feb 19, 02[E21D, E21C]
5221160 Subterranean connecting method for construction of shield tunnel and connecting apparatus thereforExpiredApr 26, 90Jun 22, 93[E21D]
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