Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889767 | Magnetic recording medium | Kenji Yokoyama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1989-12-26 |
| 4880687 | Magnetic recording medium | Kenji Yokoyama, Toru Shimozawa, Kunihiro Ueda, Fumio Maruta | 1989-11-14 |
| 4863811 | Magnetic recording medium and method of making | Kunihiro Ueda | 1989-09-05 |
| 4844978 | Magnetic recording medium | Yasufumi Takasugi, Kunihiro Ueda | 1989-07-04 |
| 4824724 | Magnetic recording medium | Kunihiro Ueda, Yasufumi Takasugi | 1989-04-25 |
| 4816341 | Magnetic recording medium | Haruyuki Morita, Yuichi Kubota, Keiko Tsuchiya | 1989-03-28 |
| 4816334 | Magnetic recording medium | Kenji Yokoyama, Fumio Maruta, Kunihiro Ueda | 1989-03-28 |
| 4810524 | Inorganic powders with improved dispersibility | Haruyuki Morita, Yuichi Kubota | 1989-03-07 |