Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7916285 | Refractometer | Hideyuki Amamiya, Yoshinori Nakashima, Junichi Matsumoto, Yoshiaki Torigoe | 2011-03-29 |
| 7492447 | Refractometer | Yoshinori Nakajima, Hideyuki Amamiya, Masaki Osawa | 2009-02-17 |
| D584648 | Refractometer | Hideyuki Amamiya | 2009-01-13 |