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:
Nov. 15, 2005
Filed:
Feb. 21, 2003
Applicants:
Mikio Kishimoto, Moriya, JP;
Yuji Sasaki, Kyoto-fu, JP;
Yumiko Kitahata, Moriya, JP;
Hideaki Watanabe, Kyoto-fu, JP;
Inventors:
Mikio Kishimoto, Moriya, JP;
Yuji Sasaki, Kyoto-fu, JP;
Yumiko Kitahata, Moriya, JP;
Hideaki Watanabe, Kyoto-fu, JP;
Assignee:
Hitachi Maxell, Ltd., Ibaraki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B005/706 ;
U.S. Cl.
CPC ...
Abstract
A magnetic powder consisting of substantially spherical or ellipsoidal particles comprising a transition metal which comprises iron and a rear earth element which is mainly present in the outer layer of the magnetic powder particles, and having a particle size of 5 to 200 nm, a coercive force of 80 to 400 kA/m and a saturation magnetization of 10 to 25 uWb/g.