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:
Feb. 03, 2026
Filed:
Nov. 04, 2022
Tdk Corporation, Tokyo, JP;
Kenichi Suzuki, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A permanent magnet contains main phase grains. The main phase grains include Nd, Fe, and B. In a cross-section of the permanent magnet, voids are formed. The cross-section is approximately parallel to an easy magnetization axis direction of the permanent magnet. An area ratio of the voids in the cross-section is from 1% to 5%. A direction orthogonal to the easy magnetization axis direction in the cross-section is expressed as AB direction. A direction in which each of the voids extends in the cross-section is expressed as VD. An angle between AB direction and VD is expressed as θ. A horizontal axis of a frequency distribution of the voids in the cross-section represents the θ. A range of the horizontal axis of the frequency distribution is from 0° to 180°. The frequency distribution is maximum in a range of θ of from 60° to 120°.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile