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:
Jul. 26, 1994
Filed:
Oct. 03, 1991
Applicant:
Inventors:
Alex Moraru, Fremont, CA (US);
Bill R Baker, Redwood City, CA (US);
Yechel A Yassif, Santa Clara, CA (US);
Assignee:
Helios Incorporated, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G06F / ;
U.S. Cl.
CPC ...
371 212 ; 371 671 ;
Abstract
A microcomputer controlled media and disk testing system having a media servowriting subsystem and a certification subsystem. The servowriting subsystem comprises a precision magnetic read/write (R/W) head positioning device based on a laser positioning device and pattern generating and writing circuitry. The certification subsystem comprises of an apparatus to open bit windows and adjust thresholds and to assess the quality and nature of defects from the positions of bits and their analog characteristics when read back relative to such windows.