Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861656 | Optical recording medium | Kenji Uchiyama, Suguru Takayama | 1989-08-29 |
| 4849304 | Optical recording medium | Kenji Uchiyama, Hajime Utsunomiya, Suguru Takayama | 1989-07-18 |
HI
Hideki Ishizaki
Overall (1989): #25,950 of 140,708Top 20%
2
Patents 1989