Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4788092 | Disc-shaped magnetic recording medium | Ryoji Chubachi, Yoshihisa Kawamura | 1988-11-29 |
| 4613545 | Magnetic recording medium | Ryoji Chubachi | 1986-09-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4788092 | Disc-shaped magnetic recording medium | Ryoji Chubachi, Yoshihisa Kawamura | 1988-11-29 |
| 4613545 | Magnetic recording medium | Ryoji Chubachi | 1986-09-23 |