Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490100 | Objective lens and optical head device | Tomohiko Sasano, Michihiro Yamagata | 2002-12-03 |
| 6465756 | Method and apparatus for engraving | Shosuke Miyaki, Tetsuo Yano | 2002-10-15 |
| 6362989 | Semiconductor memory with built-in cache | Tetsuya Tanabe, Satoru Tanoi | 2002-03-26 |
| 6349000 | Device for calculating diffraction efficiencies of a diffraction lens, lens with grating element, and optical system for reading | Michihiro Yamagata, Kazutake Boku, Tomohiko Sasano, Shusuke Ono | 2002-02-19 |