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:
Dec. 07, 1982
Filed:
Jul. 14, 1980
Applicant:
Inventor:
Richard E Fayling, White Bear Lake, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G06K / ;
U.S. Cl.
CPC ...
360 17 ; 360131 ; 235493 ;
Abstract
A system for contact duplication is disclosed wherein anhysteretic magnetization of a copy medium occurs using an anisotropic master medium wherein the two media are held in surface contact and an AC bias magnetic field is applied along the hard axis of the master media.