Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806293 | Method of producing a foamed, molded article | Hiroyuki Akiyama, Yoshimi Sudo, Mitsuru Nishida | 1989-02-21 |
| 4443393 | Method of pressurizing treatment of pre-foamed particles of polyolefin resin | Hiroyuki Akiyama, Hideki Kuwabara, Toru Yamaguchi | 1984-04-17 |