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:
Jan. 20, 1981
Filed:
May. 03, 1979
Jean-Pierre Lazzari, Montfort l'Amaury, FR;
Compagnie Internationale pour l'Informatique, Paris, FR;
Abstract
A method and apparatus for reading data defined by a plurality of magnetic elements which emit respective predetermined external magnetic fields consists in subjecting an anisotropic magnetoresistive device carrying a substantially constant electrical current to the effect of the external magnetic fields, polarizing in said magnetoresistive device by a magnetic polarizing field in such a way that the direction of magnetization and the axis of easy magnetization of the magnetoresistive material of the said device form a given angle between them, defining the maximum desired value of the said external magnetic fields to which the said magnetoresistive device will be subjected, and making the value of the said angle correspond substantially to the modulus of the sum of the said maximum desired value of external magnetic field and the magnitude of the demagnetizing magnetic field which is set up by the said magnetoresistive medium in response to the said external magnetic field having the said maximum desired value.