Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5302573 | Transfer sheet for sublimation recording | Tsukasa Ohyama, Yasushi Shimokawa, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida | 1994-04-12 |
| 5300475 | Sublimation thermal transfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida | 1994-04-05 |
| 5182395 | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate | Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida | 1993-01-26 |
| 5168093 | Sublimation thermaltransfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida | 1992-12-01 |
| 5122160 | Benzoquinone dye, rope-dyeing dye compositions, cotton rope-dyeing methods using same, and the thus dyed materials | Hitoshi Koshida, Tetsuo Sakagawa, Takayuki Nakayama, Hiroshi Suwa, Masao Imai | 1992-06-16 |
| 5002925 | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate, cyan composition for sublimation transfer record and cyan composition for color toner containing it | Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida | 1991-03-26 |
| 4954410 | Color toner composition | Keisuke Takuma, Tsukasa Ohyama, Isamu Ghoda, Tamio Mikoda, Hitoshi Koshida | 1990-09-04 |