Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436840 | Process for producing pre-foamed particles of polyolefin resin | Hiroyuki Akiyama, Kuninori Hirosawa, Hideki Kuwabara | 1984-03-13 |
| 4379859 | Pre-foamed particles of polypropylene resin and process for production thereof | Kuninori Hirosawa | 1983-04-12 |