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:
Aug. 21, 2018
Filed:
Oct. 04, 2007
Wayne Kevin Jackson, Rosanna, AU;
Francois Bauer, Saint Louis, FR;
Wayne Kevin Jackson, Rosanna, AU;
Francois Bauer, Saint Louis, FR;
NOTE PRINTING AUSTRALIA LIMITED, Craigieburn, Vic, AU;
Abstract
A flexible security document is provided which contains an authentication device including: a) source of electrical potential (), the source including a piezoelectric polymeric material including at least one terpolymer of vinylidene fluoride (VDF), trifluoroethylene (TrFE) and a halogenated ethylene based monomer containing at least one non-fluorine halogen atom, the source of electrical potential being activated by mechanical deformation; b) reporter element () including a material capable of switching electrically between a first state and a second state, the difference between the first state and the second state being able to be perceived by an unaided human; and c) conducting elements () electrically connecting the source of electrical potential and the reporter element to produce an electric circuit. The reporter element () may take a number of different forms, such as a light emitting device which lights up or undergoes color change when activated by the source of electrical potential to provide an indication of authenticity. In a particularly preferred embodiment, the flexible security document is a banknote and the source of electrical potential is applied by printing.