Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7575773 | Optical compensatory sheet producing method and apparatus, thermal treating method and apparatus, and dust removing method and apparatus | Seiji Ishizuka, Tadashi Sugiyama, Kenji Nakajima, Kazuhiko Fujiwara, Naoyuki Kawanishi | 2009-08-18 |
| 6812982 | Optical compensatory sheet producing method and apparatus, thermal treating method and apparatus, and dust removing method and apparatus | Seiji Ishizuka, Tadashi Sugiyama, Kenji Nakajima, Kazuhiko Fujiwara, Naoyuki Kawanishi | 2004-11-02 |