Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8654455 | Light quantity adjustment apparatus, lens unit and optical apparatus provided with the same | Hiroaki Naganuma | 2014-02-18 |
| 7960876 | Magnet rotor, electromagnetic drive device and light quantity adjustment device using the magnet rotor | Keijirou Amino, Akira Hakozaki | 2011-06-14 |
| 7685698 | Manufacturing method of magnet rotor | Keijirou Amino, Akira Hakozaki | 2010-03-30 |
| 6842301 | ND filter and aperture device including the same | Kazuhiro Fukasawa, Nobutaka Kumada | 2005-01-11 |
| 6842302 | ND filter, method for producing the ND filter, and aperture device including the ND filter | Kazuhiro Fukasawa, Nobutaka Kumada | 2005-01-11 |