Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7675587 | Polarizing plate and process for producing the same | Naoki Sugiyama, Masayuki Sekiguchi | 2010-03-09 |
| 7618715 | Wavelength plate | Takuhiro Ushino, Masayuki Sekiguchi | 2009-11-17 |
| 7618716 | Wave plate | Masayuki Sekiguchi | 2009-11-17 |
| 6447868 | Optical molding material, and optical disk substrate and production method thereof | Masayuki Sekiguchi, Toshihiro Ohtsuki, Takatoshi Ishigaki | 2002-09-10 |