Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8830585 | Optical element, polarization filter, optical isolator, and optical apparatus | Hideaki Hirai, Kazuhiro Umeki | 2014-09-09 |
| 8259555 | Optical pickup and optical information processing device | Yukiko Hamano, Hideaki Hirai, Kazuhiro Umeki | 2012-09-04 |
| 8154976 | Reflecting wavelength plate and optical pickup using reflecting wavelength plate | Hideaki Hirai, Kazuhiro Umeki | 2012-04-10 |
| 8154977 | Reflecting wavelength plate and optical pickup using reflecting wavelength plate | Hideaki Hirai, Kazuhiro Umeki | 2012-04-10 |
| 8085312 | Image input apparatus, image input method, personal authentication apparatus, and electronic apparatus | Nobuhiro Morita, Yuji Yamanaka, Toshiyuki Iseki, Shinichi Kosuga, Hiroaki Takahashi +1 more | 2011-12-27 |
| 7502300 | Optical pickup and optical data processing apparatus | Hideaki Hirai, Kazuhiro Umeki | 2009-03-10 |