Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849304 | Optical recording medium | Kenji Uchiyama, Hideki Ishizaki, Suguru Takayama | 1989-07-18 |
HU
Hajime Utsunomiya
Overall (1989): #107,510 of 140,708Top 80%
1
Patents 1989