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. 08, 1997
Filed:
May. 03, 1995
Applicant:
Inventor:
Alastair Sibbald, Maidenhead, GB;
Assignee:
Thorn EMI plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382127 ; 356 71 ;
Abstract
A directly viewable fingerprint image is formed by illuminating a transparent planar substrate from one surface with collimated light, the substrate having pressed against the other surface a fingerprint to be imaged. Light striking the surface against which ridges of the fingerprint are in contact undergoes internal reflection within the substrate and causes a directly viewable image of the fingerprint to be formed by a direct image producing means.