Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6118242 | Travel-limit circuit having a direct current motor for a lens | Masayuki Arai | 2000-09-12 |
| 6078442 | ND filter | Eijiroh Tada, Masakazu Yamagata, Shunichiro Wakamiya, Masayuki Arai, Takayasu Shishido | 2000-06-20 |