Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4777189 | Production of polyurethane foam | Kenji Shimomura, Shigeaki Kouketsu, Toru Okuyama | 1988-10-11 |
| 4696952 | Production of polyurethane foam | Kenji Shimomura, Shigeaki Kouketsu, Toru Okuyama | 1987-09-29 |
| 4358505 | Ink roller and a method of producing the same | Tsuneaki Narumiya, Shigeru Iwasawa | 1982-11-09 |