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:
May. 02, 2000
Filed:
May. 21, 1998
Applicant:
Inventor:
Hiroshi Ohtomo, Iwatuki, JP;
Assignee:
Asahi Seiko Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G07D / ;
U.S. Cl.
CPC ...
194319 ;
Abstract
A device and method are set forth for determining the authenticity of a coin or token which includes a housing defining a passageway to pass the coin to be tested. Coils are disposed about the housing to generate magnetic flux lines at the passageway. Detection circuits detect changes in amplitudes of the frequencies generating the flux and signals are created corresponding thereto. These signals are compared at a processor to stored data corresponding to amplitude changes for an authentic coin to determine if the coin is authentic.