Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5175372 | Process of producing high purity bis(4-hydroxyphenyl)sulfides and heat-sensitive recording materials containing the same | Akira Onoe, Masao Kawamura, Kunioki Kato, Makoto Sato, Tsuyoshi Morishita | 1992-12-29 |
| 5102858 | Heat-sensitive recording materials containing high purity bis(4-hydroxyphenyl)sulfides | Akira Onoe, Masao Kawamura, Kunioki Kato, Makoto Sato, Tsuyoshi Morishita | 1992-04-07 |