Inventor · disambiguated record
Hisashi Kitajima
Also filed as: KITAJIMA HISASHI
4 granted patents·86 citations·filing 1983–1993
79Inventor score
Top patents by PatentIndex Score
4 records- 0163US4514112AMethod for injecting grouting agent and apparatus for conducting the methodTOA GROUT KOGYO CO·Filed 1984·Granted Apr 30, 1985·24 cites·6 claims
- 0259US4545702ABoring-injection device, method for improving ground by means of the device and method for investigating ground state by means of the deviceTOA GROUT KOGYO CO·Filed 1983·Granted Oct 8, 1985·29 cites·19 claims
- 0348US5224742AMethod for cutting off water in pipeline and structure of connection portion in pipelineTOA GROUT KOGYO CO·Filed 1991·Granted Jul 6, 1993·15 cites·9 claims
- 0445US5297582AMethod for water leakage prevention in pipelineISEKI KAIHATSU KOKI·Filed 1993·Granted Mar 29, 1994·18 cites·4 claims
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