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. 01, 1992
Filed:
Feb. 04, 1991
George L Heredia, Paradise Valley, AZ (US);
Axxess Entry Technologies, Tempe, AZ (US);
Abstract
A universal key blank incorporates special geometry enabling it to be used as a blank for duplicating a variety of related but geometrically dissimilar keys. The universal key blank functions with a lock having a lock entrance slot with opposing sides and first and second opposed key interface ribs protruding from the sides of the slot with relative vertical alignment to rib geometry configured to engage first and second grooves formed in opposing sides of the blade of the universal key blank. A novel method duplicates keys by measuring and reproducing a reference distance defined by the spacing between the bit notch pattern and the key reference surface forming the first groove of the master key.