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:
Aug. 11, 1998
Filed:
Jan. 29, 1996
James S Bianco, Enfield, CT (US);
David J Horan, Westfield, MA (US);
Other;
Abstract
In a preferred embodiment, secure optical identification, including: a first lacquer layer; a metallic layer disposed on a first surface of the first lacquer layer, with a first surface of the metallic layer in contact with the first surface of the first lacquer layer; a diffraction pattern embossed in the first surface of the first lacquer layer through the metallic layer; a pattern formed in the metallic layer by demetallizing areas of the metallic layer; and a second lacquer layer, having the same refractive index as that of the first lacquer layer, disposed on a second surface of the metallic layer so as to fill in voids adjacent the diffraction pattern caused by the demetallizing areas of the metallic layer.