Issued Patents All Time
Showing 101–102 of 102 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5142394 | Twisted nematic polarizing element with a concentric circle orientation surface and optical head device incorporating the same | Junichi Asada, Shinji Uchida | 1992-08-25 |
| 4991919 | Optical head apparatus including concentric, periodic grating in a waveguide | Yoshinao Taketomi, Shinji Uchida, Takaaki Tomita, Taketoshi Yonezawa, Sadao Mizuno | 1991-02-12 |