Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828916 | Plate-like magnetoplumbite type ferrite particles for magnetic recording and magnetic recording media using the same | Shigehisa Yamamoto, Ryuji Fujita, Nanao Horiishi | 1989-05-09 |