Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4918683 | Optical information medium having a base plate made of polymethylmethacrylate which is a copolymer of methyl methacrylate and methyl acrylate | Yoshie Kodera, Tetsu Ohishi, Jun Matsumoto | 1990-04-17 |