Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4897462 | Process for producing rubber-based graft copolymers | Haruhiko Yusa, Mitsuru Hoshino | 1990-01-30 |
| 4345043 | Vinyl chloride resin composition | Haruhiko Yusa, Masanori Oota | 1982-08-17 |