Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5508428 | Spiro compound | Isao Hayakawa, Masazumi Imamura, Youichi Kimura | 1996-04-16 |
| 5476950 | Intermediates for pyridonecarboxylic acid derivatives | Isao Hayakawa | 1995-12-19 |
| 5463053 | Optically active pyridobenzoxazine derivatives | Isao Hayakawa, 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 | Isao Hayakawa | 1995-05-16 |
| 5380874 | Intermediates for pyridonecarboxylic acid derivatives | Isao Hayakawa | 1995-01-10 |
| 5286723 | Spiro compound | Isao Hayakawa, Masazumi Imamura, Youichi Kimura | 1994-02-15 |
| 5142046 | Optically active pyridobenzoxazine derivatives and intermediates thereof | Isao Hayakawa, Masazumi Imamura, Shuichi Yokohama, Nobuyuki Higashihashi, Katsuichi Sakano +1 more | 1992-08-25 |
| 5098912 | Pyridonecarboxylic acid derivatives | Isao Hayakawa | 1992-03-24 |
| 5053407 | Optically active pyridobenzoxazine derivatives and anti-microbial use | Isao Hayakawa, Masazumi Imamura, Shuichi Yokohama, Nobuyuki Higashihashi, Katsuichi Sakano +1 more | 1991-10-01 |
| 4985557 | Optically active pyridobenzoxazine derivatives and intermediates thereof | Isao Hayakawa, Masazumi Imamura, Shuichi Yokohama, Nobuyuki Higashihashi, Katsuichi Sakano +1 more | 1991-01-15 |
| 4895944 | Benzoxazine intermediates | Isao Hayakawa | 1990-01-23 |
| 4871852 | Quinoline-carboxylic acid derivatives | Isao Hayakawa, Shuichi Yokohama, Masazumi Imamura | 1989-10-03 |