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:
Jun. 05, 2012
Filed:
Dec. 06, 2010
Orjan G. Martinsen, Stabekk, NO;
Jon Nysaether, Oslo, NO;
Knut Riisnaes, Oslo, NO;
Ingvild Juvkam Dyve, Legal Representative, Oslo, NO;
Geir Mostad, Oslo, NO;
Rune Pedersen, Heggedal, NO;
Nicolai W. Christie, Hosle, NO;
Sigmund Clausen, Oslo, NO;
Orjan G. Martinsen, Stabekk, NO;
Jon Nysaether, Oslo, NO;
Knut Riisnaes, Oslo, NO;
Ingvild Juvkam Dyve, legal representative, Oslo, NO;
Geir Mostad, Oslo, NO;
Rune Pedersen, Heggedal, NO;
Nicolai W. Christie, Hosle, NO;
Sigmund Clausen, Oslo, NO;
Idex ASA, Fornebu, NO;
Abstract
A method and sensor assembly for determining the condition of a structure, especially for confirming if a measured fingerprint is on a live finger, measures characteristics of close to the structure surface. The sensor includes a first pair of current supply electrodes coupled to a current source, providing an electrical current to the skin, at least two pickup electrodes at chosen and different positions relative to the current supply electrodes, at least a first of the pickup electrodes being coupled to an instrument for measuring the voltage between the first pickup electrode and at least one of the pickup or current supply electrodes, storage for a predetermined set of values characterizing a certain condition of the surface, and means for comparing the characteristics from each pickup electrode with the measurements of the other pickup electrodes and with the predetermined set of characteristics for determining the surface condition.