Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853799 | Magnetic disk apparatus capable of writing at two different track densities | — | 1989-08-01 |
| 4811140 | Magnetic data transfer apparatus having improved transducer coil arrangement | Katsuya Enami, Sinobu Kawamura, Fumio Nagase | 1989-03-07 |