Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6667947 | Optical multi-layer information recordating medium | Takanori Maeda, Ikuya Kikuchi, Makoto Sato, Katsuhiro Koike | 2003-12-23 |
| 6618351 | Cartridge and method of cleaning recordation medium surface | Kazuo Takahashi | 2003-09-09 |
| 6584057 | Optical pickup system | Noriaki Murao | 2003-06-24 |
| 6518555 | Polarization hologram lens, optical pickup, information reproduction apparatus and information recording apparatus | Ikuya Kikuchi | 2003-02-11 |