Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6626497 | Backrest of a chair | Hiroshi Masunaga | 2003-09-30 |
| D476820 | Chair | — | 2003-07-08 |
| D476493 | Chair | — | 2003-07-01 |
| D469618 | Chair | — | 2003-02-04 |
| 6257665 | Chair | Hiroshi Masunaga | 2001-07-10 |
| D444309 | Chair | — | 2001-07-03 |
| D437132 | Chair | — | 2001-02-06 |
| D436260 | Chair | — | 2001-01-16 |
| D436259 | Chair | — | 2001-01-16 |
| 5765315 | Space-saving working equipment | Hidemi Yaguchi, Yuji Yoshida | 1998-06-16 |