Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6170911 | Child seat | Kenzou Kassai, Hiroyasu Yamamoto | 2001-01-09 |
| 5685605 | Chair | Kenzou Kassai | 1997-11-11 |
| 5681084 | Child seat apparatus | — | 1997-10-28 |
| 5480177 | Chair | — | 1996-01-02 |