Inventor
HAYAKAWA ISAO
JP27 patents
⚠️ This page may combine multiple inventors who share the name “HAYAKAWA ISAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DAIICHI SEIYAKU CO
21 patentsUS4382892AMay 10, 1983
Benzoxazine derivatives
DAIICHI SEIYAKU CO167 citations97
US5053407AOct 1, 1991
Optically active pyridobenzoxazine derivatives and anti-microbial use
DAIICHI SEIYAKU CO58 citations94
US4985557AJan 15, 1991
Optically active pyridobenzoxazine derivatives and intermediates thereof
DAIICHI SEIYAKU CO40 citations93
US5587386ADec 24, 1996
Optically active pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO19 citations92
US5286723AFeb 15, 1994
Spiro compound
DAIICHI SEIYAKU CO41 citations92
US5098912AMar 24, 1992
Pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO32 citations92
US6900225B2May 31, 2005
Quinolonecarboxylic acid derivative
DAIICHI SEIYAKU CO19 citations91
US5142046AAug 25, 1992
Optically active pyridobenzoxazine derivatives and intermediates thereof
DAIICHI SEIYAKU CO33 citations90
US4535161AAug 13, 1985
Benzoquinolizine derivatives
DAIICHI SEIYAKU CO20 citations82
US5476950ADec 19, 1995
Intermediates for pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO11 citations81
US5380874AJan 10, 1995
Intermediates for pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO11 citations81
US5696132ADec 9, 1997
Pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO8 citations74
US4539401ASep 3, 1985
Pyridobenzoxazine derivatives useful as antibacterial agents
DAIICHI SEIYAKU CO7 citations74
US5416222AMay 16, 1995
3-pyrrolidine methanamines wherein the alpha-carbon is substituted by 1 or 2 lower alkyl groups which are intermediates for pyridone-carboxylic acid derivatives
DAIICHI SEIYAKU CO8 citations73
US4871852AOct 3, 1989
Quinoline-carboxylic acid derivatives
DAIICHI SEIYAKU CO8 citations72
US6573260B1Jun 3, 2003
Cycloalkyl-substituted aminomethylpyrrolidine derivatives
DAIICHI SEIYAKU CO5 citations63
US6031102AFeb 29, 2000
Optically active pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO0 citations52
US5767127AJun 16, 1998
Optically active pyridonecarboxylic acid derivatives
DAIICHI SEIYAKU CO0 citations52
US5463053AOct 31, 1995
Optically active pyridobenzoxazine derivatives
DAIICHI SEIYAKU CO1 citations52
US4293695AOct 6, 1981
Furonaphthyridine compounds
DAIICHI SEIYAKU CO0 citations52
US7902226B2Mar 8, 2011
Dehalogeno-compounds
DAIICHI SEIYAKU CO0 citations42