Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6917576 | Retarder and optical head device installing the same | Naomitsu Umemura, Hiromasa Sato, Masahiro Murakawa, Yoshiharu Ooi, Yuzuru Tanabe | 2005-07-12 |
| 6580674 | Phase shifter and optical head device mounted with the same | Naomitsu Umemura, Hiromasa Sato, Masahiro Murakawa, Yoshiharu Ooi, Yuzuru Tanabe | 2003-06-17 |
| 5331446 | Liquid crystal optical element and a laser projection apparatus using polymer dispersed liquid crystal | Yoshinori Hirai, Hiroshi Kumai, Satoshi Niiyama, Tsuneo Wakabayashi | 1994-07-19 |