Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5413893 | Optical information recording medium | Harumichi Tsukada, Masahiro Tsumura | 1995-05-09 |
| 5114828 | Optical information recording medium containing linear acrylic resin | Tokuji Tanaka, Seiichi Ohta | 1992-05-19 |