Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4771034 | Recording materials | Kensuke Ikeda, Ken Iwakura | 1988-09-13 |
| 4751213 | Recording material | Akira Igarashi | 1988-06-14 |
| 4728633 | Recording material | Ken Iwakura, Akira Igarashi | 1988-03-01 |
| 4707464 | Recording material | Masanobu Takashima, Ken Iwakura, Akira Igarashi | 1987-11-17 |
| 4707553 | Indole derivatives and process for producing the same | — | 1987-11-17 |
| 4701565 | Process for preparation of ethers | Ken Iwakura, Hiroshi Kawakami | 1987-10-20 |
| 4644377 | Fluoran derivatives and recording material using the same | Akira Igarashi, Ken Iwakura | 1987-02-17 |
| 4629676 | Image forming method | Yoshihide Hayakawa, Kozo Sato | 1986-12-16 |
| 4585483 | Recording materials | Kensuke Ikeda, Ken Iwakura | 1986-04-29 |
| 4583104 | Recording materials | Ken Iwakura, Takekatsu Sugiyama | 1986-04-15 |
| 4529681 | Light- and heat-sensitive recording material | Toshimasa Usami, Toshiharu Tanaka | 1985-07-16 |
| 4480052 | Heat-sensitive recording materials | Seiji Ichijima, Nobutaka Ohki, Ken Iwakura | 1984-10-30 |
| 4471074 | Heat-sensitive recording materials | Ken Iwakura, Sadao Ishige | 1984-09-11 |
| 4438245 | Polymers containing aromatic sulfonic acid ester or amide groups | — | 1984-03-20 |
| 4411700 | Desensitizer compositions | Nobuyoshi Sekikawa, Ken Iwakura, Akio Miyamoto | 1983-10-25 |
| 4356109 | Method for preparing microcapsules | Keiso Saeki, Hiroharu Matsukawa | 1982-10-26 |
| 4298673 | Lithographic type diffusion transfer developing composition | Kikuo Kubotera, Eiichi Mizuki, Haruhiko Iwano, Tadahiro Fujiwara | 1981-11-03 |
| 4297470 | Image forming process | Chiaki Osada, Hisatake Ono | 1981-10-27 |
| 4269893 | Recording material containing a novel color developer | Hajime Kato, Kozo Sato | 1981-05-26 |
| 4251386 | Method for preparing microcapsules | Keiso Saeki, Hiroharu Matsukawa | 1981-02-17 |
| 4245857 | Recording element | — | 1981-01-20 |
| 4181328 | Recording element | Masataka Kiritani, Taiichi Nishimura | 1980-01-01 |