Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5077264 | Cyan dye-donor element used in thermal transfer and thermal transfer sheet using it | Yoshiaki Hayashi, Takehiro Kusumoto, Takeshi Hioki | 1991-12-31 |
| 5013712 | Magenta dye-donor element used in thermal transfer and thermal transfer sheet using it | Yoshiaki Hayashi | 1991-05-07 |
| 4804417 | Process for producing dioxazine violet pigment | Yoshiaki Hayashi, Hiroshi Okayasu | 1989-02-14 |
| 4785091 | Process for producing copper phthalocyanine pigment | Toshiaki Kishimoto, Hiroshi Okayasu | 1988-11-15 |
| 4751300 | Production of dioxazine compound | Yutaka Kayane | 1988-06-14 |
| 4450114 | Process for production of sulfuric acid semiesters | Hiroyuki Nakagawa, Mikio Sugihara, Kimiyuki Kobayashi, Katuhiko Okamoto | 1984-05-22 |
| 4351765 | Process for the production of compounds having in the molecule at least one .beta.-sulfatoethyl-sulfone group and at least one sulfonic acid group | Hiroyuki Nakagawa, Mikio Sugihara, Kimiyuki Kobayashi, Katuhiko Okamoto | 1982-09-28 |