Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5737780 | Seat lifting device for a stool | Koru Okita, Koichi Yamada, Jiro Koshijima, Kenichi Kobayashi | 1998-04-14 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5737780 | Seat lifting device for a stool | Koru Okita, Koichi Yamada, Jiro Koshijima, Kenichi Kobayashi | 1998-04-14 |