Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4482501 | Process for producing aminoaryl-.beta.-sulfatoethylsulfone | Utazi Sawa, Takemi Tokieda, Shun Hayakawa, Yasuo Tezuka | 1984-11-13 |
| 4346046 | Process for producing aminoaryl-.beta.-sulfatoethylsulfone | Utazi Sawa, Takemi Tokieda, Shun Hayakawa, Yasuo Tezuka | 1982-08-24 |
| 4257770 | Disazo dye composition | Masayuki Tsuji, Seizo Konishi, Tadashi Yamamoto, Takemi Tokieda, Utazi Sawa +1 more | 1981-03-24 |