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:
Feb. 27, 2001
Filed:
Nov. 12, 1998
Wenyu Han, Princeton, NJ (US);
Victor Zazzu, Belle Mead, NJ (US);
Other;
Abstract
A card (document or instrument) embodying the invention includes a pattern formed between the top and bottom surfaces of the card, whereby the card, when illuminated by a light source, produces a unique output light pattern which can be detected by a photo sensor. The formed pattern may take any number of different shapes ranging from stripes of different size and spacing, as in a bar code, to complex two-dimensional shapes and images. The pattern formed between the top and bottom surfaces of a card may include light pipes (paths) extending from one side of a card to one, or more, other side(s) of the card. Alternatively, the pattern formed between the top and bottom surfaces may include a bundle of optical fibers extending from one side of a card to one, or more, of the other sides of the card. Alternatively, the pattern formed between the top and bottom surfaces of the card may include light pipes or optical fibers extending “vertically” between these two surfaces. Alternatively, an image may be embedded between the top and bottom surfaces.