Tobishima Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7023468 Photo survey service systemExpiredMay 22, 01Apr 04, 06[H04N]
7018466 Process for producing a concrete and a mortarExpiredJan 10, 05Mar 28, 06[C04B]
6817427 Device and method for extracting a gas hydrateExpiredSep 13, 02Nov 16, 04[E21B]
2003/0183,129 Concrete admixture, mortar admixture and blended cementAbandonedMar 14, 03Oct 02, 03[C04B]
6347838 Method for replacing cutters of tunnel-excavating machine, method for excavating tunnel, and tunnel excavating machineExpiredJul 13, 00Feb 19, 02[E21D, E21C]
5101605 Domed structures having retractable roofsExpiredOct 10, 89Apr 07, 92[E04B]
5058332 Domed structures having retractable roofsExpiredOct 10, 89Oct 22, 91[E04B]
4767240 Pile-framed structureExpiredOct 27, 86Aug 30, 88[E02B, E02D]

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