Patents by Inventor Etienne Perret

Etienne Perret has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9697446
    Abstract: The present invention relates to a set of security documents. Each security document within the set having an optical code, notably a barcode, which is neither connected nor coupled to any electronic chip that may be carried by the security document. The optical code on each security document within the set encodes the same information for the same optical reader. Each security document having different respective electromagnetic signature, these signatures being unique to each of the security documents.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: July 4, 2017
    Assignees: Institut Polytechnique de Grenoble, Arjowiggins Security
    Inventors: Etienne Perret, Arnaud Vena, Smail Tedjini, Yann Boutant, Christophe Halope
  • Publication number: 20150102105
    Abstract: The present invention relates to a set of security documents. Each security document within the set having an optical code, notably a barcode, which is neither connected nor coupled to any electronic chip that may be carried by the security document. The optical code on each security document within the set encodes the same information for the same optical reader. Each security document having different respective electromagnetic signature, these signatures being unique to each of the security documents.
    Type: Application
    Filed: December 18, 2014
    Publication date: April 16, 2015
    Inventors: Etienne Perret, Arnaud Vena, Smail Tedjini, Yann Boutant, Christophe Halope
  • Patent number: 8556184
    Abstract: A chipless RFID tag comprises a plurality of disjoint parallel conducting bands formed on a dielectric support, in which conducting bridges interlink neighboring conducting bands, the conducting bridges delimiting, between the conducting bands, portions of dielectric bands of distinct lengths, each portion of dielectric brand determining a resonant frequency of the tag, the set of resonant frequencies of the tag defining an identification code.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: October 15, 2013
    Assignees: Institut Polytechnique de Grenoble, Universite de Savoie
    Inventors: Etienne Perret, Smail Tedjini, Nair Deepn Vasudevan, Frédéric Garet, Lionel Duvillaret, Arnaud Maurice Vena
  • Publication number: 20130015248
    Abstract: A chipless RFID tag comprises a plurality of disjoint parallel conducting bands formed on a dielectric support, in which conducting bridges interlink neighboring conducting bands, the conducting bridges delimiting, between the conducting bands, portions of dielectric bands of distinct lengths, each portion of dielectric brand determining a resonant frequency of the tag, the set of resonant frequencies of the tag defining an identification code.
    Type: Application
    Filed: February 8, 2011
    Publication date: January 17, 2013
    Applicants: Universite de Savoie, Institut Polytechnique de Grenoble
    Inventors: Etienne Perret, Smail Tedjini, Deepa Vasudevan Nair, Frédéric Garet, Lionel Duvillaret, Arnaud Maurice Vena
  • Patent number: 4851506
    Abstract: The present invention relates to compositions comprising(a) at least one polyimide having an inherent viscosity of at least 0.1 dl/g (measured at 25.degree. C. on a 0.5% by weight solution in N-methylpyrrolidone) and containing at least 50 mol % of structural units of the formula I ##STR1## in which m and p independently of one another are integers from 0 to 4, n is an integer from 0 to 3, R.sup.1 and R.sup.2 independently of one another are C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy and R.sup.3 is a divalent radical of an aromatic diamine which is substituted in at least one ortho-position relative to at least one N atom by alkyl, alkoxy, alkoxyalkyl, cycloalkyl or aralkyl or in which two adjacent C atoms of the aromatic radical are substituted by alkylene, and(b) at least one aromatic polyimide which is soluble in organic solvents and photocrosslinkable and which contains at least 50 mol %, relative to the total quantity of diamine units, of radicals R.sup.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: July 25, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Ottmar Rohde, Andre-Etienne Perret, Josef Pfeifer