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:
Jun. 25, 2002
Filed:
Nov. 09, 1999
Applicant:
Inventor:
Shinichi Inaba, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/312 ; G11B 2/736 ;
U.S. Cl.
CPC ...
G01R 3/312 ; G11B 2/736 ;
Abstract
In an apparatus for detecting foreign particles adhered to a magnetic head, a current error rate of data read from the magnetic head is calculated, and an accumulative error rate of data read from the magnetic head is calculated. Then, the current error rate is compared with the accumulative error rate to determine whether or not foreign particles are adhered to the magnetic head.