Inventor · disambiguated record
Isao Hayakawa
Also filed as: HAYAKAWA ISAO
26 granted patents·4 pending applications·501 citations·filing 1980–2014
96Inventor score
Files withDAIICHI SEIYAKU CO22DAIICHI SANKYO CO LTD2DAIICHI PHAMACEUTICAL CO LTD1DAIICHI SEIYAKU COMPANY LTD1JUNTENDO EDUCATIONAL FOUND1
Top patents by PatentIndex Score
30 records- 0196US4382892ABenzoxazine derivativesDAIICHI SEIYAKU CO·Filed 1981·Granted May 10, 1983·167 cites·8 claims
- 0294US5053407AOptically active pyridobenzoxazine derivatives and anti-microbial useDAIICHI SEIYAKU CO·Filed 1986·Granted Oct 1, 1991·58 cites·6 claims
- 0393US5098912APyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1989·Granted Mar 24, 1992·32 cites·14 claims
- 0492US4985557AOptically active pyridobenzoxazine derivatives and intermediates thereofDAIICHI SEIYAKU CO·Filed 1989·Granted Jan 15, 1991·40 cites·1 claims
- 0588US5286723ASpiro compoundDAIICHI SEIYAKU CO·Filed 1992·Granted Feb 15, 1994·41 cites·34 claims
- 0687US5142046AOptically active pyridobenzoxazine derivatives and intermediates thereofDAIICHI SEIYAKU CO·Filed 1991·Granted Aug 25, 1992·33 cites·1 claims
- 0785US6900225B2Quinolonecarboxylic acid derivativeDAIICHI SEIYAKU CO·Filed 2001·Granted May 31, 2005·19 cites·6 claims
- 0885US4535161ABenzoquinolizine derivativesDAIICHI SEIYAKU CO·Filed 1983·Granted Aug 13, 1985·20 cites·5 claims
- 0977US5380874AIntermediates for pyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1994·Granted Jan 10, 1995·11 cites·6 claims
- 1074US7977327B2Substituted pyrrolidine derivativeDAIICHI SANKYO CO LTD·Filed 2005·Granted Jul 12, 2011·1 cites·19 claims
- 1173US5587386AOptically active pyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1993·Granted Dec 24, 1996·19 cites·9 claims
- 1272US5476950AIntermediates for pyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1995·Granted Dec 19, 1995·11 cites·4 claims
- 1371US5416222A3-pyrrolidine methanamines wherein the alpha-carbon is substituted by 1 or 2 lower alkyl groups which are intermediates for pyridone-carboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1991·Granted May 16, 1995·8 cites·8 claims
- 1468US4871852AQuinoline-carboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1987·Granted Oct 3, 1989·8 cites·3 claims
- 1566US4539401APyridobenzoxazine derivatives useful as antibacterial agentsDAIICHI SEIYAKU CO·Filed 1983·Granted Sep 3, 1985·7 cites·5 claims
- 1660US7902226B2Dehalogeno-compoundsDAIICHI SEIYAKU CO·Filed 2006·Granted Mar 8, 2011·0 cites·77 claims
- 1759USRE41149EOptically active pyridonecarboxylic acid derivativesDAIICHI SANKYO CO LTD·Filed 2004·Granted Feb 23, 2010·0 cites·12 claims
- 1859US5508428ASpiro compoundDAIICHI PHAMACEUTICAL CO LTD·Filed 1995·Granted Apr 16, 1996·10 cites·41 claims
- 1958US2004142957A1Quinolonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 2004·Application pending·0 cites
- 2051US2016257651A1Novel compound with antibacterial activityJUNTENDO EDUCATIONAL FOUND·Filed 2014·Application pending·0 cites
- 2149US5696132APyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1992·Granted Dec 9, 1997·8 cites·11 claims
- 2247US8455482B2Substituted pyrrolidine derivativeTAKAHASHI HISASHI·Filed 2011·Granted Jun 4, 2013·0 cites·17 claims
- 2345US2004063754A1Dehalogeno compoundsFiled 2001·Application pending·0 cites
- 2444US6573260B1Cycloalkyl-substituted aminomethylpyrrolidine derivativesDAIICHI SEIYAKU CO·Filed 1999·Granted Jun 3, 2003·5 cites·17 claims
- 2544US4895944ABenzoxazine intermediatesDAIICHI SEIYAKU COMPANY LTD·Filed 1987·Granted Jan 23, 1990·2 cites·3 claims
- 2639US2004097515A1Antimicrobial drug reduced in effect on heartFiled 2002·Application pending·0 cites
- 2734US5463053AOptically active pyridobenzoxazine derivativesDAIICHI SEIYAKU CO·Filed 1994·Granted Oct 31, 1995·1 cites·1 claims
- 2834US4293695AFuronaphthyridine compoundsDAIICHI SEIYAKU CO·Filed 1980·Granted Oct 6, 1981·0 cites·6 claims
- 2933US6031102AOptically active pyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1998·Granted Feb 29, 2000·0 cites·5 claims
- 3032US5767127AOptically active pyridonecarboxylic acid derivativesDAIICHI SEIYAKU CO·Filed 1995·Granted Jun 16, 1998·0 cites·27 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →