Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4337324 | Vinyl chloride resin composition | Haruhiko Yusa, Yo Iizuka | 1982-06-29 |
| 4206290 | Fire retardant resinous compositions | Haruhiko Yusa, Masanori Oota, Kazuo Takahashi | 1980-06-03 |