Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9507176 | Polarization optical article in which uneven coloring by polarization color has been improved | Keishi Yoshikawa, Koichiro Oka | 2016-11-29 |
| 8496328 | Process for producing optical article | Nobutaka Takami, Shinya Kajiri | 2013-07-30 |
| 7318960 | Polarizing molded article and process for preparing the same | Tamenobu Yamamoto, Ryoji Kammori, Koichiro Oka | 2008-01-15 |
| 6165392 | Method and apparatus for manufacturing lenses and a lens manufactured thereby | Masahiko Okamoto | 2000-12-26 |