Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821050 | Optical information recording medium | Masao Yabe | 1989-04-11 |
YT
Yonosuke Takahashi
Overall (1989): #40,196 of 140,708Top 30%
1
Patents 1989