Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6305873 | Jointing construction | Eiji Tauchi, Akihiko Nakano, Kenta Matsubara, Shuuichi Nishimura, Susumu Okayama +1 more | 2001-10-23 |
| 6076995 | Segments | Eiji Tauchi, Akihiko Nakano, Kenta Matsubara, Susumu Okayama | 2000-06-20 |