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. 10, 2026
Filed:
Jun. 28, 2024
Furukawa Electric Co., Ltd., Tokyo, JP;
Uacj Corporation, Tokyo, JP;
Hideyuki Hatakeyama, Tokyo, JP;
Shimpei Todo, Tokyo, JP;
Kotaro Kitawaki, Tokyo, JP;
Koichiro Takiguchi, Tokyo, JP;
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
UACJ CORPORATION, Tokyo, JP;
Abstract
A magnetic disk substrate having a pair of front and back principal surfaces, containing fixed portions that are in contact with fixing jigs when the magnetic disk substrate configured as a magnetic disk is incorporated in a hard disk device on the respective front and back principal surfaces, wherein a root mean square deviation Rq of surface roughnesses of the fixed portions on the respective front and back principal surfaces is from 0.01 to 0.44 μm.; and a magnetic disk using the same.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile