Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816341 | Magnetic recording medium | Masatoshi Nakayama, Haruyuki Morita, Keiko Tsuchiya | 1989-03-28 |
| 4810524 | Inorganic powders with improved dispersibility | Masatoshi Nakayama, Haruyuki Morita | 1989-03-07 |