Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5681685 | Photopolymerizable composition containing squarylium compound | Tsuguo Yamaoka, Kenichi Koseki, Ikuo Shimizu, Hirotaka Kinoshita, Shoshiro Matsushita | 1997-10-28 |
| 5660970 | Optical information recording medium using a squarylium compound | Ikuo Shimizu, Yukiyoshi Ito, Tsutomu Sato | 1997-08-26 |