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:
Apr. 30, 1991
Filed:
Aug. 24, 1989
Applicant:
Inventors:
Peter J Harissis, Rush, NY (US);
Jeffrey P Serbicki, Rochester, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
360135 ; 360133 ; 360 60 ;
Abstract
A flexible magnetic data storage disk with a ferromagnetic surveillance ring-shaped marker integrally bonded to the disk substrate around the central aperture. A series of slits are formed in the disk substrate under the marker to serve as 'tear initiators' if a user attempts to remove the surveillance marker thus rendering the disk unusable and thereby protecting the data on the disk from unauthorized removal from a secure area.