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:
Jan. 30, 2001
Filed:
Jul. 29, 1998
Shinichi Fukuzumi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
When a finger,is put on a fingerprint input sensor,it is held in contact with living body potential deriving electrodes,and,. In addition, a finger portion near the first joint is held in contact with a living body grounding electrode,to ground the living body. With the finger,pushed against the fingerprint input sensor,for inputting the fingerprint, finger muscle potentials signals,to,are obtained from these electrodes. A living body data measuring unit,takes differences of these finger muscle potentials for one another, and outputs the result as living body data potential data,A living body data analyzing unit,analyzes the potential data and frequency data of the living body potential difference data,and outputs analysis data,A living body discriminating unit,makes a determination, from the analysis data,as to whether the finger,is a finger of living body or a replica finger.