Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841507 | Optical head for an optical recording and reproducing apparatus | Hitoshi Imai, Kimiyuki Koyanagi, Michihiro Tadokoro | 1989-06-20 |
RA
Ryuichiro Arai
Overall (1989): #59,893 of 140,708Top 45%
1
Patents 1989