Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889767 | Magnetic recording medium | Masatoshi Nakayama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1989-12-26 |
| 4880687 | Magnetic recording medium | Masatoshi Nakayama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1989-11-14 |
| 4816334 | Magnetic recording medium | Masatoshi Nakayama, Fumio Maruta, Kunihiro Ueda | 1989-03-28 |
| 4801823 | Sample hold circuit | — | 1989-01-31 |