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US Patent 7981359 Rotor and process for manufacturing the same

Patent 7981359 was granted and assigned to Hitachi on July, 2011 by the United States Patent and Trademark Office.

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Patent abstract

A rotor comprising bonded magnet portions mainly composed of magnet powder and a binder, which are embedded in a soft magnetic portion mainly composed of soft magnetic powder and a binder, the rotor being produced by a compression-molding method, and the magnetic pole surfaces of the bonded magnet portions being embedded in the soft magnetic portion.

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