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:
Nov. 26, 2002
Filed:
Aug. 09, 2000
Kenichiro Sonoda, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An authentication signal extraction part measures the frequency spectrum of electric noise specific to a semiconductor element for authentication so that a code depending on this frequency spectrum is generated as an authentication signal. An authentication signal storage part previously registers the authentication signal. When performing authentication, the authentication signal generated from the authentication signal extraction part is compared with a registered authentication signal stored in the authentication signal storage part so that a result display part displays successful authentication when coincidence is recognized. Thus, authentication is performed without forming a nonvolatile memory or writing the authentication signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile