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. 14, 2012
Filed:
Apr. 30, 2008
Mats Robertsson, Norrköping, SE;
Petronella Norberg, Linköping, SE;
Xin Wang, Norrköping, SE;
Staffan Nordlinder, Norrköping, SE;
Anna Malmström, Norrköping, SE;
Lars-olov Hennerdal, Örebro, SE;
James Peter Snelling, Andover, GB;
Philip George Cooper, Stockbridge, GB;
Mats Robertsson, Norrköping, SE;
Petronella Norberg, Linköping, SE;
Xin Wang, Norrköping, SE;
Staffan Nordlinder, Norrköping, SE;
Anna Malmström, Norrköping, SE;
Lars-Olov Hennerdal, Örebro, SE;
James Peter Snelling, Andover, GB;
Philip George Cooper, Stockbridge, GB;
De la Rue International Limited, Hampshire, GB;
Abstract
The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.