Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D758490 | Ballpoint pen | Fumie Shibata | 2016-06-07 |
| 8435615 | Hollow foamed blow-molded article | Tomoo Tokiwa, Masato Naito | 2013-05-07 |
| 8221876 | Skin-covered propylene resin foamed molded article | Tomoo Tokiwa, Masato Naito | 2012-07-17 |