Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7649825 | Splitting element, light emitter, and optical pickup apparatus | Kazuhiro Tsuchida, Keiji Sakai, Tetsuo Ueyama, Katsushige Masui, Naotaka Otsuka | 2010-01-19 |
| 7483360 | Optical pickup device using polarizing hologram element and hologram laser therefor | Katsushige Masui, Kazuhiro Tsuchida, Kazunori Matsubara, Masahiro Ikehara, Keiji Sakai +1 more | 2009-01-27 |
| 6847665 | Semiconductor laser device and method for producing the same | Shigehiro Yamada, Kazuhiro Tsuchida, Katsushige Masui, Takahide Ishiguro, Naotaka Ohtsuka | 2005-01-25 |
| RE35332 | Optical pickup device with diffraction device | Yoshio Yoshida, Yasuo Nakata, Yukio Kurata | 1996-09-24 |
| 5408450 | Optical pickup apparatus | Yoshio Yoshida, Yukio Kurata | 1995-04-18 |
| 5272329 | Optical pickup device using a holographic optical element and an amplifier | Shigehiro Yamada, Naruichi Yokogawa, Yasushi Seike, Koji Yoshifusa | 1993-12-21 |
| 5111449 | Optical pick-up device using diffraction grating element having two sub-regions | Yukio Kurata, Yoshio Yoshida | 1992-05-05 |
| 5049732 | Optical pickup device with diffraction device | Yoshio Yoshida, Yasuo Nakata, Yukio Kurata | 1991-09-17 |
| 4904856 | Optical pickup device with diffraction sensing | Yukio Kurata, Yoshio Yoshida | 1990-02-27 |