Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017621 | Polypropylene resin pre-expanded beads, manufacturing method thereof and expansion-molding method using said beads | Minoru Tada, Kyoichi Nakamura | 1991-05-21 |
| 4931477 | Polypropylene resin pre-expanded beads, manufacturing method thereof and expansion-molding method using said beads | Minoru Tada, Kyoichi Nakamura | 1990-06-05 |