Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6440507 | Unsymmetrical dioxazine compound dichroic dye liquid crystal composition and liquid crystal display element | Toshihiko Tanaka | 2002-08-27 |
| 6399752 | Polyazo compound or salt thereof and dye-based polarization film containing the same | Yoshiteru Ohta, Narutoshi Hayashi | 2002-06-04 |