The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2024
Filed:
Mar. 22, 2021
Applicant:
Tdk Corporation, Tokyo, JP;
Inventor:
Takuma Hayakawa, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/02 (2006.01); H01F 1/057 (2006.01); H01F 7/02 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H02K 1/02 (2013.01); H01F 1/0577 (2013.01); H01F 7/0205 (2013.01); H01F 41/0293 (2013.01);
Abstract
A rare earth permanent magnet has a first surface and satisfies A1<B1, A1≥C1, and A1≥D1 where A1 is a coercive force of a portion aincluding a center of gravity of the first surface, B1 is a coercive force of a portion b, C1 is a coercive force of a portion c, and D1 is a coercive force of a portion d, and a heavy rare earth element is present on a top layer of the first surface.