Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671247 | Optical pick-up apparatus, optical element, and objective lens having diffracting section | Toshiyuki Kojima, Kohei Ota | 2003-12-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671247 | Optical pick-up apparatus, optical element, and objective lens having diffracting section | Toshiyuki Kojima, Kohei Ota | 2003-12-30 |