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. 07, 2017
Filed:
Jun. 28, 2013
Applicants:
Masanobu Itaya, Minami-Alps, JP;
Kinobu Osakabe, Tokorozawa, JP;
Toshio Takizawa, Kai, JP;
Inventors:
Assignees:
HOYA CORPORATION, Tokyo, JP;
HOYA GLASS DISK VIETNAM II LTD., Yen Province, VN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/82 (2006.01); G11B 5/73 (2006.01);
U.S. Cl.
CPC ...
G11B 5/82 (2013.01); G11B 5/7315 (2013.01);
Abstract
A magnetic-disk glass substrate of the present invention has an average value of squares of inclinations of 0.0025 or less and a frequency at which squares of inclinations are 0.004 or more of 15% or less, in a case where samples of inclinations on a main surface are obtained at intervals of 10 nm.