Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5567470 | Heat-sensitive transfer sheet containing blue dyestuff | Isamu Ghoda, Tsukasa Ohyama, Keisuke Takuma | 1996-10-22 |
| 5387686 | Dye for heat-sensitive transfer record and ink composition for heat-sensitive transfer record | Tsukasa Ohyama, Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda +4 more | 1995-02-07 |
| 5358536 | Dyestuff for heat-sensitive transfer record and transfer sheet containing same | Isamu Ghoda, Tsukasa Ohyama, Keisuke Takuma | 1994-10-25 |
| 5359075 | Quinophthalone compound | Tsukasa Ohyama, Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda | 1994-10-25 |
| 5302573 | Transfer sheet for sublimation recording | Tsukasa Ohyama, Yasushi Shimokawa, Keisuke Takuma, Isamu Ghoda, Akitoshi Igata | 1994-04-12 |
| 5300475 | Sublimation thermal transfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Akitoshi Igata | 1994-04-05 |
| 5296445 | Dye for heat-sensitive transfer record, ink composition for heat-sensitive transfer record, and transfer sheet | Tsukasa Ohyama, Yasushi Shimokawa, Yoriaki Matsuzaki, Keisuke Takuma, Isamu Ghoda +4 more | 1994-03-22 |
| 5183474 | Heat-sensitive sublimation transfer cyan dye and transfer sheet | Tsukasa Ohyama, Yasushi Shimokawa, Isamu Ghoda, Keisuke Takuma | 1993-02-02 |
| 5182395 | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate | Keisuke Takuma, Tsukasa Ohyama, Akitoshi Igata, Tamio Mikoda, Isamu Ghoda | 1993-01-26 |
| 5168093 | Sublimation thermaltransfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tsukasa Ohyama, Tamio Mikoda, Isamu Ghoda, Akitoshi Igata | 1992-12-01 |
| 5122160 | Benzoquinone dye, rope-dyeing dye compositions, cotton rope-dyeing methods using same, and the thus dyed materials | Tetsuo Sakagawa, Takayuki Nakayama, Hiroshi Suwa, Akitoshi Igata, Masao Imai | 1992-06-16 |
| 5061290 | Rope dyeing process using halogen indigo derivative and dyed article thus obtained | Tetsuo Sakagawa, Takayuki Nakayama, Hiroshi Suwa | 1991-10-29 |
| 5034016 | Dye compositions for dyeing denim cotton yarn in a range of colors and dyeing process and dyed articles using same | Tetsuo Sakagawa, Takayuki Nakayama, Hiroshi Suwa, Masao Imai, Akio Karasawa | 1991-07-23 |
| 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, Akitoshi Igata, Tamio Mikoda, Isamu Ghoda | 1991-03-26 |
| 4954410 | Color toner composition | Keisuke Takuma, Tsukasa Ohyama, Isamu Ghoda, Tamio Mikoda, Akitoshi Igata | 1990-09-04 |