Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663841 | Optical pickup device having a magnetic circuit whose poles are configured along a common path within one pole within a focus coil | Taichi Akiba, Osamu Ueda, Shigeyuki Sasanuma | 1997-09-02 |