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:
Mar. 30, 1976
Filed:
Jun. 18, 1974
Daniel Silverman, Tulsa, OK (US);
Everett A Johnson, Park Ridge, IL (US);
Other;
Abstract
There is disclosed apparatus and method for unerasably marking computer and other information records and the like in a precise, machine readable manner so as to identify the particular record, and to control access to the record by providing means for authenticating a control member presented for access to the record. The illustrated system involves preparing a master card of opaque material through which micro patterns have been burned by a laser. This master is used to produce a facsimile pattern in a control member and/or the record to be identified and retrieved. The facsimile card is used as control member and the micro pattern compared with a bank of unique micro patterns to authenticate the pattern bearing control member and to identify the record bearing a similar micro pattern. The bank of master micro patterns may comprise a plurality of master cards, or may conveniently be on a reel or strip of material, with separate frames or areas, each having its unique pattern of microperforations, with an index corresponding to the indicia of individual patterns. Details of such an indexed bank are disclosed in our copending application Ser. No. 272,739.