Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6411587 | Optical pickup optical system, optical pickup apparatus, coupling optical system, coupling optical system lens and recording/reproduction apparatus | Norikazu Arai, Toshiyuki Kojima | 2002-06-25 |
| 6403017 | Process for producing Mn-Zn ferrite | Osamu Kobayashi, Osamu Yamada, Shunji Kawasaki | 2002-06-11 |