Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4451417 | Method of producing extruded plate-like polystyrene foam | Hiroyuki Akiyama, Hidewo Hatakeyama, Yoshiaki Momose, Fusao Imai | 1984-05-29 |
| 4393016 | Process for producing plate-like polystyrene resin foam | Hiroyuki Akiyama, Hideo Hatakeyama, Yoshiaki Momose, Fusao Imai | 1983-07-12 |
| 4260572 | Process for producing foamed polystyrene boards | Hiroyuki Akiyama, Hideo Hatakeyama, Toru Yamamoto | 1981-04-07 |
| 4255371 | Process for producing olefinic resin foams | Teruo Masukawa, Fusao Imai | 1981-03-10 |