Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5545024 | Screw for double-shaft extruding device and double-shaft extruding device | Toshiro Iwata, Akira Hatakeyama, Kazuhisa Nishigai | 1996-08-13 |
| 5464282 | Screw for double-shaft extruding device and double-shaft extruding device | Toshiro Iwata, Akira Hatakeyama, Kazuhisa Nishigai | 1995-11-07 |