Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5567470 | Heat-sensitive transfer sheet containing blue dyestuff | Hitoshi Koshida, Isamu Ghoda, Keisuke Takuma | 1996-10-22 |
| 5387686 | Dye for heat-sensitive transfer record and ink composition for heat-sensitive transfer record | Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida +4 more | 1995-02-07 |
| 5359075 | Quinophthalone compound | Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida | 1994-10-25 |
| 5358536 | Dyestuff for heat-sensitive transfer record and transfer sheet containing same | Hitoshi Koshida, Isamu Ghoda, Keisuke Takuma | 1994-10-25 |
| 5342974 | Halogenated anthraquinone and their use as near infrared rays absorbing optical filters | Shizuo Kuroda, Keisuke Takuma, Hiroshi Aiga | 1994-08-30 |
| 5302573 | Transfer sheet for sublimation recording | Yasushi Shimokawa, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata | 1994-04-12 |
| 5300475 | Sublimation thermal transfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata | 1994-04-05 |
| 5296445 | Dye for heat-sensitive transfer record, ink composition for heat-sensitive transfer record, and transfer sheet | Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda, Hitoshi Koshida +4 more | 1994-03-22 |
| 5248784 | 4-carbonyl-substituted coumarin compound | Kazuhiko Murayama, Yoriaki Matsuzaki, Susumu Kasamatsu, Keisuke Takuma, Kimitoshi Kato | 1993-09-28 |
| 5183474 | Heat-sensitive sublimation transfer cyan dye and transfer sheet | Yasushi Shimokawa, Isamu Ghoda, Keisuke Takuma, Hitoshi Koshida | 1993-02-02 |
| 5182395 | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate | Keisuke Takuma, Akitoshi Igata, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida | 1993-01-26 |
| 5168093 | Sublimation thermaltransfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata | 1992-12-01 |
| 5045434 | Visible radiation sensitive composition containing substituted 3-(benzothiazo-2-yl)-7-diethylaminocoumarin as sensitizers | Ichiro Yoshihara, Motoko Okuhara, Takao Yamamoto, Naozumi Iwasawa, Yasuo Doi +5 more | 1991-09-03 |
| 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, Akitoshi Igata, Tamio Mikoda, Isamu Ghoda, Hitoshi Koshida | 1991-03-26 |
| 4954410 | Color toner composition | Keisuke Takuma, Isamu Ghoda, Tamio Mikoda, Hitoshi Koshida, Akitoshi Igata | 1990-09-04 |