Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5629129 | Heat sensitive ink sheet and image forming method | Mitsuru Yamamoto, Akihiko Takeda, Yasutomo Goto | 1997-05-13 |
| 5407777 | Diazo-type recording material comprising a 1-phenyl-3-pyrazolidone(phenidone) as an anti-oxidant | Hirokazu Shimada | 1995-04-18 |
| 5328796 | Diazo type recording material utilizing microencapsulated diazo compound, a coupler and a hydroxyphenylsulfone derivative | Taketatsu Sugiyama, Makoto Ohno, Toshiharu Tanaka | 1994-07-12 |
| 5304452 | Heat sensitive diazo type recording material utilizing microencapsulated diazo compound and a coupling component | Makoto Ohno, Toshiharu Tanaka | 1994-04-19 |
| 5028580 | Heat sensitive recording material | Toshimasa Usami | 1991-07-02 |
| 4999333 | Heat sensitive recording material | Toshimasa Usami, Seiji Hatakeyama, Ken Iwakura | 1991-03-12 |
| 4962009 | Microcapsule containing photo-oxidizing agent and leuco dye | Shintaro Washizu, Jun Yamaguchi, Fumiaki Shinozaki, Toshimasa Usami, Toshiaki Endo +1 more | 1990-10-09 |
| 4929411 | Heat-sensitive recording material | Toshimasa Usami | 1990-05-29 |
| 4857501 | Manufacturing method of a heat sensitive recording material | Toshimasa Usami, Sumitaka Tatsuta, Seiji Hatakeyama | 1989-08-15 |
| 4845071 | Heatsensitive recording material | Toshimasa Usami, Seiji Hatakeyama | 1989-07-04 |
| 4840933 | Heat sensitive recording material | Toshimasa Usami, Seiji Hatakeyama | 1989-06-20 |
| 4826807 | Heat-sensitive recording material | Kenji Ikeda | 1989-05-02 |
| 4820682 | Heat sensitive recording materials | Toshimasa Usami | 1989-04-11 |
| 4797384 | Heat-sensitive recording sheet | Akira Igarashi, Shinichiro Serizawa | 1989-01-10 |
| 4758547 | Heat-sensitive recording material | Yuichi Itabashi, Noriyuki Hosoi | 1988-07-19 |
| 4721700 | Heat-sensitive recording material | Noriyuki Hosoi, Yuichi Itabashi | 1988-01-26 |