Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860127 | Magnetic disk cartridge with erasure-preventing device | Kenji Takahashi | 1989-08-22 |
| 4812937 | Magnetic disk cartridge with improved center plate for disk mounting | Mika Kaneko | 1989-03-14 |