Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4277573 | Vinyl chloride resin and alkyl methacrylate resin processing aid composition | Yo Iizuka, Kiyoshi Midorikawa, Yumi Midorikawa, heir | 1981-07-07 |
| 4268636 | Vinyl chloride resin composition with processing aid | Yo Iizuka, Haruhiko Yusa, by Taeko Midorikawa, heir | 1981-05-19 |
| 4206292 | Vinyl chloride resin composition containing polymeric processing aid | Masaki Ohya, Yo Iizuka | 1980-06-03 |