Inventor · disambiguated record
Hideki Umehara
Also filed as: UMEHARA HIDEKI
14 granted patents·318 citations·filing 1990–2001
94Inventor score
Top patents by PatentIndex Score
14 records- 0190US5696758AOptical recording mediaMITSUI TOATSU CHEMICALS·Filed 1996·Granted Dec 9, 1997·78 cites·16 claims
- 0287US5633106AOptical recording media and a method of recording and reproducing informationMITSUI TOATSU CHEMICALS·Filed 1995·Granted May 27, 1997·62 cites·18 claims
- 0385US5855979AOptical recording mediumMITSUI CHEMICALS INC·Filed 1997·Granted Jan 5, 1999·48 cites·38 claims
- 0483US5948593AOptical recording mediumMITSUI CHEMICALS INC·Filed 1997·Granted Sep 7, 1999·36 cites·8 claims
- 0577US5492744AOptical information recording medium and composition for optical information recording filmMITSUI TOATSU CHEMICALS·Filed 1993·Granted Feb 20, 1996·20 cites·6 claims
- 0669US5446142APhthalocyanine and naphthalocyanine light-absorbing compound and optical recording medium containing sameMITSUI TOATSU CHEMICALS·Filed 1993·Granted Aug 29, 1995·17 cites·22 claims
- 0764US5876820AOptical information recording medium and composition for optical information recording filmMITSUI CHEMICALS INC·Filed 1995·Granted Mar 2, 1999·13 cites·7 claims
- 0857USRE38979EOptical information recording medium and composition for optical information recording filmMITSUI CHEMICALS INC·Filed 2001·Granted Feb 14, 2006·2 cites·32 claims
- 0957US5750229APhthalocyanine compound and optical recording medium containing itMITSUI TOATSU CHEMICALS·Filed 1997·Granted May 12, 1998·5 cites·7 claims
- 1056US5646273APhthalocyanine compound and optical recording medium containing itMITSUI TOATSU CHEMICALS·Filed 1995·Granted Jul 8, 1997·5 cites·16 claims
- 1149US5188898AFerromagnetic metal particles and preparation process thereofMITSUI TOATSU CHEMICALS·Filed 1990·Granted Feb 23, 1993·12 cites·16 claims
- 1244US5672462AOptical recording mediumMITSUI TOATSU CHEMICALS·Filed 1996·Granted Sep 30, 1997·6 cites·8 claims
- 1341US5658707AOptical recording mediaMITSUI TOATSU CHEMICALS·Filed 1995·Granted Aug 19, 1997·10 cites·7 claims
- 1435US6060606ADipyrromethene metal chelate compoundsMITSUI CHEMICALS INC·Filed 1999·Granted May 9, 2000·4 cites·2 claims
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