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Patent applications and USPTO patent grants for Hamamura; Atsushi.The latest application filed is for "powder material for rare earth-iron-boron based permanent magnets".
Patent | Date |
---|---|
Powder material for rare earth-iron-boron based permanent magnets Grant 5,281,250 - Hamamura , et al. January 25, 1 | 1994-01-25 |
Corrosion-resistant permanent magnet and method for preparing the same Grant 4,959,273 - Hamamura , et al. September 25, 1 | 1990-09-25 |
Corrosion resistant permanent magnet Grant 4,942,098 - Hamamura , et al. July 17, 1 | 1990-07-17 |
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