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. 12, 1985
Filed:
Jul. 14, 1982
Applicant:
Inventors:
Chester Piotrowski, White Bear Lake, MN (US);
Neil W Loeding, Mounds View, MN (US);
Raymond M Warner, Jr, Edina, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360113 ;
Abstract
A thin film magnetic recording playback head is disclosed wherein mechanically coupled films of a magnetostrictive material and of a piezoresistive material are utilized with a solid state amplifier electrically coupled to sense resistance changes in the piezoresistive film. In operation, localized magnetic patterns on a recording medium induce strain in the magnetostrictive film, which in turn induces in the piezoresistive film corresponding changes in electrical resistance.