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:
May. 02, 2023
Filed:
Aug. 07, 2019
Applicant:
Hoya Corporation, Tokyo, JP;
Inventor:
Shinji Eda, Hung Yen Province, VN;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/735 (2006.01); G11B 5/73 (2006.01);
U.S. Cl.
CPC ...
G11B 5/73921 (2019.05); G11B 5/73911 (2019.05); G11B 5/73917 (2019.05); G11B 5/73919 (2019.05);
Abstract
A disk-shaped substrate for a magnetic disk has a diameter D of 85 mm or more and a thickness T of 0.6 mm or less, and a material of the substrate has a Young's modulus E of 90 GPa or more.