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:
May. 31, 1994
Filed:
Aug. 23, 1990
Hemant K Mody, Rochester, NY (US);
Other;
Abstract
Method and devices for erasing and writing on magnetic particle oriented media are described. Erasure is caused by moving a magnetic field which enters and exits the media at a finite angle but stays parallel to the media in some region. A magnetic stencil comprising regions of dissimilar permeabilities is described. The magnetic stencil can be used in conjunction with the erasure means to simultaneously create alternating fields parallel and normal to the media thereby permitting information to be written over any previously recorded information without requiring a seperate erasure step.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile