Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885341 | Rubber composition | Nagatoshi Sugi | 1989-12-05 |
| 4816519 | High strength-high modulus rubber composition comprising a mixture of rubbery copolymers of an acenaphthalene copolymer and another rubber | Koichi Nishimura | 1989-03-28 |