Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5244892 | Cephem compounds, and antibacterial agents | Kikoh Obi, Tatsuhiro Saito, Keiji Hirai, Hideyuki Fukuda | 1993-09-14 |
| 5043450 | 8-alkoxyquinolonecarboxylic acid and salts thereof | Kuniyoshi Masuzawa, Keiji Hirai, Takayoshi Ishizaki | 1991-08-27 |
| 4980470 | 8-alkoxyquinolonecarboxylic acid and salts thereof | Kuniyoshi Masuzawa, Keiji Hirai, Takayoshi Ishizaki | 1990-12-25 |
| 4914104 | Imidazo [1,5-a]pyrimidine derivatives and process for their preparation | Tsutomu Irikura, Hiroaki Uchida, Hirotaka Shinoda, Satoshi Murayama, Susumu Kinoshita | 1990-04-03 |
| 4894458 | Quinolonecarboxylic acid derivatives and their preparation | Kuniyoshi Masuzawa, Keiji Hirai, Takayoshi Ishizaki | 1990-01-16 |
| 4826982 | Quinolonecarboxylic acid derivatives | Kuniyoshi Masuzawa, Keiji Hirai, Takayoshi Ishizaki | 1989-05-02 |
| 4791118 | Quinolonecarboxylic acid derivatives and their preparation | Kuniyoshi Masuzawa, Keiji Hirai, Takayoshi Ishizaki | 1988-12-13 |
| 4791225 | Halogenobenzoic acid derivatives and their preparation | Tsutomu Irikura, Satoshi Murayama, Keiji Hirai, Takayoshi Ishizaki | 1988-12-13 |
| 4788320 | Benzoylacetic acid ester derivatives and process for their preparations | Tsutomu Irikura, Satoshi Murayama, Keiji Hirai, Takayoshi Ishizaki | 1988-11-29 |
| 4753953 | Pyridonecarboxylic acid derivatives and antibacterial pharmaceutical compositions thereof | Kuniyoshi Masuzawa, Keiji Hirai, Takayoshi Ishizaki | 1988-06-28 |
| 4649198 | Imidazo(1,5-a)pyrimidine derivatives and their use as antimycotic agents | Tsutomu Irikura, Hiroaki Uchida, Hirotaka Shinoda, Satoshi Murayama, Susumu Kinoshita | 1987-03-10 |
| 4578392 | Pyrazolo[1,5-a]pyridine derivatives and anti-allergic compositions containing them | Tsutomu Irikura, Keigo Nishino, Toshiya Ikeda | 1986-03-25 |
| 4559402 | Pyrazolopyridines and tetrahydro pyrazolopyridines | Tsutomu Irikura, Hideo Okubo, Katsuya Awano | 1985-12-17 |
| 4556715 | Nicotinic acid derivatives | Tsutomu Irikura, Kodo Okada | 1985-12-03 |
| 4448962 | Substituted quinoline carboxylic acid derivatives | Tsutomu Irikura, Akira Ito, Hiroshi Koga | 1984-05-15 |
| 4202977 | S-Triazolo [1,5-a] pyridine derivatives | Tsutomu Irikura | 1980-05-13 |