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:
Mar. 28, 1995
Filed:
Aug. 26, 1994
Kevin McDonnell, Pleasanton, CA (US);
George Barker, deceased, late of San Jose, CA (US);
Trace Mountain Products, Inc., San Jose, CA (US);
Abstract
A method for duplicating data on a rotating magnetic disk in sectors on concentric tracks so that the sectors are aligned with each other from track to track and referenced to an index mark. The index mark is sensed as the disk rotates. The time elapsed between sensed index marks is counted to define the angular displacement of the disk. A magnetic head is moved successively to the tracks on the disk. Data to be duplicated is recorded in sequence, sector by sector, on the respective tracks beginning at different offsets from the index mark such that recording begins with the next sector encountered after the head arrives at the respective tracks.