Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4774602 | Method for distinguishing original of a magnetically recorded medium from its duplicates | — | 1988-09-27 |
| 4323844 | Test system for detecting a permanent defect and a temporary defect in magnetic recording tape | — | 1982-04-06 |
| 4271442 | Plane magnetic recording medium | — | 1981-06-02 |
| 4238777 | Drop-out detecting system for video recording magnetic tape | Akira Okada, Ryoiti Aizawa | 1980-12-09 |