Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6467975 | Quantity-of-light adjusting device and optical apparatus having the same | Masahiko Tsuzuki, Toshiaki Kawanishi, Youichi Iwasaki | 2002-10-22 |
| 6350068 | Quantity-of-light adjusting device and optical apparatus having the same | Masahiko Tsuzuki, Toshiaki Kawanishi, Youichi Iwasaki | 2002-02-26 |