Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5032567 | Additive for heat-sensitive recording material, the recording material and method for production of the recording material | Akihiro Ohtsubo, Kouhei Morikawa, Sumio Soya | 1991-07-16 |
| 4939269 | 3-substituted hydantoins | Akihiro Ohtsubo, Kouhei Morikawa, Sumio Soya | 1990-07-03 |