Patents by Inventor Patrick Queffelec

Patrick Queffelec 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).

  • Variable-response magnetic radiofrequency device
    Patent number: 8610428
    Abstract: This variable-response magnetic radiofrequency device integrated into a substrate comprises: a beam that is mobile relative to the substrate having, at each end, a transversal part mechanically anchored to the substrate and at least one central arm connecting the transversal parts to each other, at least one of the transversal parts being made out of a piezoelectric material, actuating electrodes associated with the piezoelectric material to apply a stress on the central arm, a magnetic element directly deposited on the central arm whose permeability varies as a function of the stress, and a conductive strip comprising a central part fixed to an upper face of the magnetic element opposite the lower face of this magnetic element pointed towards the central arm.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 17, 2013
    Assignees: Commissariat a l'Energie Atomique et aux Energies Alternatives, Centre National de la Recherche, Universite Brest-Bretagne Occidentale
    Inventors: Bernard Viala, Smaali Rafik, Patrick Queffelec, Evangeline Benevent, Jean-Philippe Michel
  • VARIABLE-RESPONSE MAGNETIC RADIOFREQUENCY DEVICE
    Publication number: 20110116194
    Abstract: This variable-response magnetic radiofrequency device integrated into a substrate comprises: a beam that is mobile relative to the substrate having, at each end, a transversal part mechanically anchored to the substrate and at least one central arm connecting the transversal parts to each other, at least one of the transversal parts being made out of a piezoelectric material, actuating electrodes associated with the piezoelectric material to apply a stress on the central arm, a magnetic element directly deposited on the central arm whose permeability varies as a function of the stress, and a conductive strip comprising a central part fixed to an upper face of the magnetic element opposite the lower face of this magnetic element pointed towards the central arm.
    Type: Application
    Filed: November 15, 2010
    Publication date: May 19, 2011
    Applicants: Commissariat a l'energie atomique et aux energies alternatives, Centre National De La Recherche Scientifique, Universite Brest-Bretagne Occidentale
    Inventors: Bernard Viala, Smaali Rafik, Patrick Queffelec, Evangeline Benevent, Jean-Philippe Michel
  • Microwave resonant circuit and tunable microwave filter using same
    Publication number: 20040183630
    Abstract: The invention relates to a resonant ultra-high frequency circuit and a tuneable ultra-high frequency filter using the resonant circuit. The resonant circuit comprises at least one resonant microstrip line element, the resonant microstrip line element comprising a conducting ribbon (1) and a ground plane (4). The resonant circuit comprises at least one composite element (3) composed of an alternation of ferromagnetic layers and insulating layers located between the conducting ribbon and the ground plane.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 23, 2004
    Inventors: Gerard Tanne, Erwan Salahun, Patrick Queffelec, Olivier Acher, Anne Lise Adenot