Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6649328 | Method for manufacture of molding die for Fresnel lens sheet | Katsuhiko Hayashi | 2003-11-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6649328 | Method for manufacture of molding die for Fresnel lens sheet | Katsuhiko Hayashi | 2003-11-18 |