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:
Oct. 03, 2006
Filed:
Jul. 08, 2005
Manmohan Singh Chawla, University Park, MD (US);
Manmohan Singh Chawla, University Park, MD (US);
Other;
Abstract
A substrate card, in the form of a Metrocard®, farecard, keycard, passport, boarding pass or the like, presented for controlled gateway passage at an automatic reader, is photographed and the captured card image is digitized. The card then is heated to a point where trace explosive present on the card is subjected to an energetic reaction imparting a char smudge signature. The card is cooled and a second image is captured and digitized. The digitized images are subjected to a subtractor stage resulting in an isolated char smudge signature image possibly in the form of at least a partial fingerprint residue recognizable by a computer. Upon char image detection, which may include a fingerprint matching process, the computer directs the controlled gateway to restrain the card presenter and secure the card as evidence. The card may be pre-coated to avoid ignition and to enhance trace material adhesion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile