Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839334 | Heat sensitive recording sheet | Toshiyuki Abe, Katsumasa Kikkawa, Michihiro Gonda, Mikiko Kanasugi | 1989-06-13 |
| 4760150 | Bis(methylenedioxyphenyl)imidazoles | Shinichi Sato, Hiroto Takita | 1988-07-26 |
| 4749796 | Xanthene derivative and a production process of the same | Michihiro Gonda, Toshio Obara | 1988-06-07 |
| 4642663 | 6-tetrahydrofurfurylaminofluoran compound useful as a color former on an heat sensitive recording sheet | Susumu Suzuka, Michihiro Gonda, Katsumasa Kikkawa | 1987-02-10 |
| 4597795 | 6-tetrahydrofurfurylaminofluoran compound useful as a color former | Susumu Suzuka, Michihiro Gonda, Katsumasa Kikkawa | 1986-07-01 |