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:
Apr. 17, 2001
Filed:
Aug. 18, 1997
Roman Baldur, Baie d'Urfe, CA;
Forensic Technology Wai Inc., Montreal, CA;
Abstract
A method for obtaining a signature from a fired bullet by mounting the bullet to turn substantially about a longitudinal axis of the bullet, illuminating a surface of the bullet, obtaining and storing a frame image at a given position of the surface portion using microscope optics, the frame image having a transverse extent substantially transverse to the longitudinal axis, advancing the frame image position by an amount less than a transverse extent of the frame image, repeating the last two steps a plurality of times to obtain a plurality of overlapping frame images, combining the frame images to form a continuous composite image having a transverse extent much greater than the transverse extent of the frame images, and computing a signature of the composite image along a line extending in the transverse extent of the composite image. The points of the signature are determined from image data along a direction of striations in the composite image which is at an angle with respect to the transverse line and the longitudinal axis.