Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7722935 | Retardation film, use of said retardation film, and novel modified polymer | Seiji Umemoto, Yutaka Ohmori, Michie Sakamoto, Junzou Miyazaki | 2010-05-25 |
| 7468777 | Method of producing elliptically polarizing plate and image display using the elliptically polarizing plate | Ikuo Kawamoto, Seiji Umemoto, Hideyuki Yonezawa, Kazuya Hada | 2008-12-23 |