Inventor · disambiguated record
Hitoshi Tsugaya
Also filed as: TSUGAYA HITOSHI
10 granted patents·252 citations·filing 1978–1997
92Inventor score
Top patents by PatentIndex Score
10 records- 0184US4292417ASemipermeable membraneDAICEL LTD·Filed 1979·Granted Sep 29, 1981·38 cites·15 claims
- 0279US5947127ATobacco filters and method of producing the sameDAICEL CHEM·Filed 1997·Granted Sep 7, 1999·70 cites·12 claims
- 0363US5707522APermselective membrane of polyacrylonitrile copolymer and process for producing the sameDAICEL CHEM·Filed 1996·Granted Jan 13, 1998·32 cites·13 claims
- 0461US4200726ASemipermeable membrane of phenoxy resin containing sulfuric acid groups or salts thereofDAICEL LTD·Filed 1978·Granted Apr 29, 1980·15 cites·12 claims
- 0556US5706833ATobacco filters and method of producing the sameDAICEL CHEM·Filed 1994·Granted Jan 13, 1998·22 cites·3 claims
- 0652US5393432ASeparating membrane of polyion complexMITI MINI INT TRADE & IND·Filed 1992·Granted Feb 28, 1995·17 cites·7 claims
- 0751US5967149ATobacco filter material and a method of producing the sameDAICEL CHEM·Filed 1997·Granted Oct 19, 1999·17 cites·19 claims
- 0851US5554292APermselective membrane of polyacrylonitrile copolymer and process for producing the sameDAICEL CHEM·Filed 1992·Granted Sep 10, 1996·18 cites·9 claims
- 0948US5711322ATobacco filter material and a method of producing the sameDAICEL CHEM·Filed 1994·Granted Jan 27, 1998·14 cites·22 claims
- 1042US4279846AProcess for preparing semipermeable membrane having selective permeabilityDAICEL CHEM·Filed 1980·Granted Jul 21, 1981·9 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →