IH

Isao Hayakawa

DC Daiichi Seiyaku Co.: 12 patents #1 of 111Top 1%
DC Daiichi Pharmaceutical Co.: 11 patents #7 of 399Top 2%
DL Daiichi Sankyo Company, Limited: 3 patents #194 of 842Top 25%
Overall (All Time): #155,725 of 4,157,543Top 4%
26
Patents All Time

Issued Patents All Time

Showing 1–25 of 26 patents

Patent #TitleCo-InventorsDate
8455482 Substituted pyrrolidine derivative Hisashi Takahashi, Junichi Kuroyanagi, Rie Miyauchi, Masatoshi Nagamochi, Makoto Takemura 2013-06-04
7977327 Substituted pyrrolidine derivative Hisashi Takahashi, Junichi Kuroyanagi, Rie Miyauchi, Masatoshi Nagamochi, Makoto Takemura 2011-07-12
7902226 Dehalogeno-compounds Hisashi Takahashi, Rie Miyauchi, Masao Itoh, Makoto Takemura 2011-03-08
RE41149 Optically active pyridonecarboxylic acid derivatives Youichi Kimura 2010-02-23
6900225 Quinolonecarboxylic acid derivative Makoto Takemura, Hisashi Takahashi, Katsuhiro Kawakami, Masao Itoh, Tetsuya Suzuki +3 more 2005-05-31
6573260 Cycloalkyl-substituted aminomethylpyrrolidine derivatives Makoto Takemura, Hisashi Takahashi, Rie Miyauchi, Toshiyuki Takeda 2003-06-03
6031102 Optically active pyridonecarboxylic acid derivatives Youichi Kimura 2000-02-29
5767127 Optically active pyridonecarboxylic acid derivatives Youichi Kimura 1998-06-16
5696132 Pyridonecarboxylic acid derivatives Youichi Kimura, Hisashi Takahashi 1997-12-09
5587386 Optically active pyridonecarboxylic acid derivatives Youichi Kimura 1996-12-24
5508428 Spiro compound Shohgo Atarashi, Masazumi Imamura, Youichi Kimura 1996-04-16
5476950 Intermediates for pyridonecarboxylic acid derivatives Shohgo Atarashi 1995-12-19
5463053 Optically active pyridobenzoxazine derivatives Shohgo Atarashi, Yoichi Kimura, Katsuhiro Kawakami 1995-10-31
5416222 3-pyrrolidine methanamines wherein the alpha-carbon is substituted by 1 or 2 lower alkyl groups which are intermediates for pyridone-carboxylic acid derivatives Shohgo Atarashi 1995-05-16
5380874 Intermediates for pyridonecarboxylic acid derivatives Shohgo Atarashi 1995-01-10
5286723 Spiro compound Shohgo Atarashi, Masazumi Imamura, Youichi Kimura 1994-02-15
5142046 Optically active pyridobenzoxazine derivatives and intermediates thereof Shohgo Atarashi, Masazumi Imamura, Shuichi Yokohama, Nobuyuki Higashihashi, Katsuichi Sakano +1 more 1992-08-25
5098912 Pyridonecarboxylic acid derivatives Shohgo Atarashi 1992-03-24
5053407 Optically active pyridobenzoxazine derivatives and anti-microbial use Shohgo Atarashi, Masazumi Imamura, Shuichi Yokohama, Nobuyuki Higashihashi, Katsuichi Sakano +1 more 1991-10-01
4985557 Optically active pyridobenzoxazine derivatives and intermediates thereof Shohgo Atarashi, Masazumi Imamura, Shuichi Yokohama, Nobuyuki Higashihashi, Katsuichi Sakano +1 more 1991-01-15
4895944 Benzoxazine intermediates Shohgo Atarashi 1990-01-23
4871852 Quinoline-carboxylic acid derivatives Shohgo Atarashi, Shuichi Yokohama, Masazumi Imamura 1989-10-03
4539401 Pyridobenzoxazine derivatives useful as antibacterial agents Yoshiaki Tanaka 1985-09-03
4535161 Benzoquinolizine derivatives 1985-08-13
4382892 Benzoxazine derivatives Tokiyuki Hiramitsu, Yoshiaki Tanaka 1983-05-10