Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8830585 | Optical element, polarization filter, optical isolator, and optical apparatus | Hideaki Hirai, Toshimichi Nasukawa | 2014-09-09 |
| 8259555 | Optical pickup and optical information processing device | Yukiko Hamano, Hideaki Hirai, Toshimichi Nasukawa | 2012-09-04 |
| 8178010 | Optical device and method of producing the same | Hideaki Hirai | 2012-05-15 |
| 8154976 | Reflecting wavelength plate and optical pickup using reflecting wavelength plate | Hideaki Hirai, Toshimichi Nasukawa | 2012-04-10 |
| 8154977 | Reflecting wavelength plate and optical pickup using reflecting wavelength plate | Hideaki Hirai, Toshimichi Nasukawa | 2012-04-10 |
| 7894133 | Optical element and optical device | Hideaki Hirai, Yoshiyuki Kiyosawa, Yasuhiro Fujimura | 2011-02-22 |
| 7697395 | Optical device, method of producing the same, optical pickup, and optical information processing device | Hideaki Hirai | 2010-04-13 |
| 7502300 | Optical pickup and optical data processing apparatus | Hideaki Hirai, Toshimichi Nasukawa | 2009-03-10 |
| 7195732 | Method and mold for fabricating article having fine surface structure | — | 2007-03-27 |
| 5830605 | Gradation mask method of producing the same and method of forming special surface profile on material using gradation mask | Shosen Sato, Masaaki Sato | 1998-11-03 |
| 5776639 | Exposure mask, method of producing the same, exposure mask producing apparatus, and method of forming surface profile on material using exposure mask | Shosen Sato | 1998-07-07 |
| 5368908 | Optical information recording medium | Wasaburo Ohta, Isamu Orima, Masashi Nakazawa, Yuzi Onodera | 1994-11-29 |