Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6469838 | Illumination device having light intensity distribution converting elements | Shinya Hasegawa | 2002-10-22 |
| 6356395 | Light intensity distribution converting device and optical data storage apparatus | Shinya Hasegawa | 2002-03-12 |