Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8444675 | Tooth-hardening apparatus | Keiichi Nakamura | 2013-05-21 |
| 8021391 | Tooth-hardening apparatus | Keiichi Nakamura | 2011-09-20 |
| D491645 | Toilet trainer | Fumie Shibata, Yuuki Shibata, Keita Tanaka, Masatoshi Doi | 2004-06-15 |
| D491646 | Potty | Fumie Shibata, Yuuki Shibata, Keita Tanaka, Masatoshi Doi | 2004-06-15 |