Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4464484 | Process for producing prefoamed polymer particles | Shohei Yoshimura | 1984-08-07 |
| 4443393 | Method of pressurizing treatment of pre-foamed particles of polyolefin resin | Hiroyuki Akiyama, Toru Yamaguchi, Masahiko Kishida | 1984-04-17 |
| 4440703 | Process for producing foamed and molded article of polypropylene resin | Hiroyuki Akiyama, Kuninori Hirosawa | 1984-04-03 |
| 4436840 | Process for producing pre-foamed particles of polyolefin resin | Hiroyuki Akiyama, Sumio Shimada, Kuninori Hirosawa | 1984-03-13 |