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. 25, 1997
Filed:
Sep. 29, 1994
Jitendra K Singh, San Jose, CA (US);
Other;
Abstract
The present invention provides a new and novel method for generating a identification number unique to a particular magnetic storage device. In a first preferred method, areas of a storage device which are defective are located. Then specific bad bits within the bad area are determined. The locations of the bad areas plus the location of the bad bits are used to create a identification number for the particular storage device. In a second preferred method, the surface of the magnetic storage device is read in the analog domain. The amplitude variations during the read process are used to generate a identification number for the storage device. Once a identification number is determined, it is used for preventing software piracy or other uses where a specific magnetic storage device needs to be identified.