Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5041172 | Permanent magnet having good thermal stability and method for manufacturing same | Masaaki Tokunaga, Hiroshi Kogure, Noriaki Meguro | 1991-08-20 |
| 4814139 | Permanent magnet having good thermal stability and method for manufacturing same | Masaaki Tokunaga, Hiroshi Kogure, Noriaki Meguro | 1989-03-21 |
| 4284440 | Rare earth metal-cobalt permanent magnet alloy | Masaaki Tokunaga, Hirokazu Murayama | 1981-08-18 |