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:
Apr. 20, 2004
Filed:
Oct. 12, 1999
Takayuki Sugawara, Fukushima-ken, JP;
Takahiro Kawauchi, Fukushima-ken, JP;
Masahiro Tenpaku, Kanagawa-ken, JP;
Yoshiyasu Kubota, Kanagawa-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A magnetic disk apparatus is capable of reading normal data following a read error of a reference signal that has occurred due to a scratch or the like on a disk surface. In the magnetic disk apparatus, if a reference signal (STM) fails to be read at point P, then an elapsed time (Tw) is measured, and a time T indicating the difference between a time T at which a read gate is supposed to be opened and the time Tw is determined. The read gate is opened after the time T has passed, thereby making it possible to properly read data and subject the read data to a decoding process.