Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4981836 | Recording material | Ken Iwakura, Hiroo Fukunaga, Akira Igarashi | 1991-01-01 |
| 4839332 | Heat-sensitive recording material | Kensuke Ikeda, Ken Iwakura | 1989-06-13 |
| 4835133 | Recording material | Kensuke Ikeda, Masato Satomura, Yuichi Wakata, Ken Iwakura | 1989-05-30 |