Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852076 | Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics | Takeo Ohta, Shizuhiko Tanigawa | 1989-07-25 |
TN
Tatsushi Nakamura
Overall (1989): #52,775 of 140,708Top 40%
1
Patents 1989