Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660970 | Optical information recording medium using a squarylium compound | Ikuo Shimizu, Hiroshi Toyoda, Tsutomu Sato | 1997-08-26 |
YI
Yukiyoshi Ito
Kyowa Hakko Kogyo Co.: 1 patents #69 of 147Top 50%
Overall (1997): #54,456 of 185,788Top 30%
1
Patents 1997