Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5737780 | Seat lifting device for a stool | Koru Okita, Shigeo Saeki, Koichi Yamada, Kenichi Kobayashi | 1998-04-14 |
| 4646815 | Heat exchange mat | Hideo Iwata, Yoshiaki Kitagawa, Tetsuya Tachibana | 1987-03-03 |