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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.:

US 5067155 B1

PDFFull Text
Date of Patent:
Nov. 19, 1991

Filed:

May. 09, 1990

Method and means to limit access to computer systems

Applicant:
Inventors:

James S Bianco, Enfield, CT (US);

James T Madsen, Enfield, CT (US);

Michael Ceppetelli, Broadbrook, CT (US);

John S Fahy, Agawam, MA (US);

Assignee:

Control Module Inc., Enfield, CT (US);

Attorney:

Crozier; John H.

Primary Examiner:

Thomas H Tarcza

Assistant Examiner:

David Cain

Int. Cl.
CPC ...
G11B / ; H04K / ;
U.S. Cl.
CPC ...
380 25 ; 380 23 ; 380-3 ;
Abstract

In a preferred embodiment, a method of limiting access to computer systems which method includes scrambling identification card information with time information so that the resulting code can be used for only a limited period of time, thus preventing unauthorized persons from using the code at a later time. In another aspect of the invention, one or more .mu.-metal shields are embedded in an identification card, thus identifying the card as being valid and also providing means to indicate when a valid card is being removed from a card reader.

Find Patent Forward Citations

Bianco, James. (1991). Method and means to limit access to computer systems (U.S. Patent No. 5067155). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5067155

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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