Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300475 | Sublimation thermal transfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tsukasa Ohyama, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata | 1994-04-05 |
| 5182395 | Isopropyl 1-amino-4-m-toluidinoanthraquinone-2-carboxylate | Keisuke Takuma, Tsukasa Ohyama, Akitoshi Igata, Isamu Ghoda, Hitoshi Koshida | 1993-01-26 |
| 5168093 | Sublimation thermaltransfer printing sheet comprising novel magenta dyestuffs | Keisuke Takuma, Tsukasa Ohyama, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata | 1992-12-01 |
| 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, Isamu Ghoda, Hitoshi Koshida | 1991-03-26 |
| 4954410 | Color toner composition | Keisuke Takuma, Tsukasa Ohyama, Isamu Ghoda, Hitoshi Koshida, Akitoshi Igata | 1990-09-04 |
| 4898850 | Pyridone dyestuff for thermal transfer recording and printing sheets and methods employing same | Akitosi Igata | 1990-02-06 |
| 4628091 | Process for producing dianthraquinone-N,N'-dihydrazine and its chlorination product | Kimitoshi Kato, Hiroshi Aiga, Tunehiro Sakai | 1986-12-09 |
| 4552684 | Dichroic dye and liquid crystalline composition for color display | Yasuyuki Yamada, Tsutomu Nishizawa, Tooru Miyahara, Masaharu Kikutsugi | 1985-11-12 |