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:
Sep. 20, 2005
Filed:
May. 24, 2002
Applicants:
Hien Dang, Nanuet, NY (US);
Isao Yoneda, Yokohama, JP;
Tetsuo Ueda, Sagamihara, JP;
Yuzo Nakagawa, Hiratsuka, JP;
Sri M. Sri-jayantha, Ossining, NY (US);
Inventors:
Hien Dang, Nanuet, NY (US);
Isao Yoneda, Yokohama, JP;
Tetsuo Ueda, Sagamihara, JP;
Yuzo Nakagawa, Hiratsuka, JP;
Sri M. Sri-Jayantha, Ossining, NY (US);
Assignee:
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B005/596 ;
U.S. Cl.
CPC ...
Abstract
A method (and structure) senses a rotational vibration of a disk drive. The disk drive includes a rotating disk. The disk includes a plurality of reference bits across a surface thereof. The method (and structure) includes detecting the reference bits across a pattern on the rotating disk, and analyzing a time interval between adjacent ones of the reference bits.