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Patents Represented by Attorney Showmaker and Mattare

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Printing ink, use of micro-wires as antennas in security documents, method for producing a security document and methods for authentication of security documents

Patent number: 7188768

Abstract: The present invention relates to a printing ink comprising at least one film forming binder and plurality of at least one type of electrically conductive micro-wires wherein the mean length of said type of micro-wires is in a range of between 3 ?m to 250 ?m.

Type: Grant

Filed: September 27, 2000

Date of Patent: March 13, 2007

Assignee: SICPA Holding S.A.

Inventors: Olivier Rozumek, Edgar Müller