Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888068 | Process for manufacturing permanent magnet | Masaaki Tokunaga, Minoru Endoh, Shigeho Tanigawa | 1989-12-19 |
| 4814139 | Permanent magnet having good thermal stability and method for manufacturing same | Masaaki Tokunaga, Hiroshi Kogure, Chitoshi Hagi | 1989-03-21 |