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:
Feb. 02, 1999
Filed:
Aug. 12, 1996
Edmond Tuilier, Marseilles, FR;
Philippe Martin, Beaune, FR;
Kiota International, La Ciotat, FR;
Abstract
Data validation uses redundant storage of the data on two-layer magnetic tapes. A method and system provide data recording and reading on such magnetic tapes with a high degree of protection from errors and/or fraudulent behavior. The two-layer tape includes a first layer with a high coercive field positioned on a support and a second magnetic layer with a lower coercive field covering the first layer. Synchronous recording is done on the two layers so that all data is recorded on the second layer and some of the date is recorded on the first layer. Data on the second layer is validated upon reading by reading the data in the first layer after erasure of the second layer.