Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889671 | Production method of prefoamed particles of polyolefin resin | Hiroyuki Akiyama, Hideki Kuwabara, Toru Yamaguchi | 1989-12-26 |
| 4716021 | Heat treatment apparatus for polyolefin resin particles | Hiroyuki Akiyama, Shigeru Okabe, Toru Yamaguchi | 1987-12-29 |
| 4692507 | Propylene-base random copolymer particles and production process thereof | Hiroyuki Akiyama, Hideki Kuwabara | 1987-09-08 |
| 4602082 | Propylene-base random copolymer particles and production process thereof | Hiroyuki Akiyama, Hideki Kuwabara | 1986-07-22 |
| 4399087 | Process for producing foamed polyolefin articles from aged pre-foamed particles of polyolefin resins | Hiroyuki Akiyama, Kuninori Hirosawa, Hideharu Inada | 1983-08-16 |