Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6807003 | Optical sheet, optical sheet manufacturing system, and optical sheet cutting machine | Hiroyoshi Kobayashi, Kazuya Yamanaka, Masakatsu Ohuchi | 2004-10-19 |
| 6698901 | Image forming system and optical screen unit | Hiroyoshi Kobayashi, Kazuya Yamanaka, Masakatsu Ohuchi | 2004-03-02 |