Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835070 | Magnetic recording medium and method of producing the same | Hideo Kurokawa, Tsutomu Mitani, Kazuo Yokoyama | 1989-05-30 |
| 4833031 | Magnetic recording medium | Hideo Kurokawa, Tsutomu Mitani, Masaru Odagiri | 1989-05-23 |