Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889746 | Process for manufacturing an optical recording medium | Kenichi Utsumi, Tetsuya Yuasa, Yasuyuki Goto, Nagaaki Koshino | 1989-12-26 |
IT
Iwao Tsugawa
Overall (1989): #101,846 of 140,708Top 75%
1
Patents 1989