Patents by Inventor Abdelkrim Choujaa

Abdelkrim Choujaa 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).

  • High-frequency acoustic wave device
    Patent number: 8138856
    Abstract: An acoustic wave device comprising a piezoelectric layer on an omnidirectional acoustic mirror and excitation and/or reception means on a surface of said piezoelectric layer, capable of exciting waves in a band gap of the acoustic mirror.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: March 20, 2012
    Assignees: Centre National de la Recherche Scientifique, Universite de Franche Comte
    Inventors: Abdelkrim Khelif, Abdelkrim Choujaa, Vincent Laude
  • HIGH-FREQUENCY ACOUSTIC WAVE DEVICE
    Publication number: 20110133859
    Abstract: An acoustic wave device comprising a piezoelectric layer on an omnidirectional acoustic mirror and excitation and/or reception means on a surface of said piezoelectric layer, capable of exciting waves in a band gap of the acoustic mirror.
    Type: Application
    Filed: January 28, 2011
    Publication date: June 9, 2011
    Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE FRANCHE COMTE
    Inventors: Abdelkrim KHELIF, Abdelkrim CHOUJAA, Vincent LAUDE
  • High-frequency acoustic wave device
    Patent number: 7880563
    Abstract: An acoustic wave device comprising a piezoelectric layer on an omnidirectional acoustic mirror and excitation and/or reception means on a surface of said piezoelectric layer, capable of exciting waves in a band gap of the acoustic mirror.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: February 1, 2011
    Assignees: Centre National de la Recherche Scientifique, Universite de Franche Comte
    Inventors: Abdelkrim Khelif, Abdelkrim Choujaa, Vincent Laude
  • High-Frequency Acoustic Wave Device
    Publication number: 20080211602
    Abstract: An acoustic wave device comprising a piezoelectric layer on an omnidirectional acoustic mirror and excitation and/or reception means on a surface of said piezoelectric layer, capable of exciting waves in a band gap of the acoustic mirror.
    Type: Application
    Filed: February 16, 2006
    Publication date: September 4, 2008
    Inventors: Abdelkrim Khelif, Abdelkrim Choujaa, Vincent Laude
  • Micro-Electromagnet including an integrated magnetic circuit and coil
    Patent number: 5863024
    Abstract: An electromagnetic micro-actuator includes a coil for generating a magnetic field which acts on a movable element at least partially made of a magnetic material, and a magnetic circuit to drive the magnetic flux towards a gap closable by the motion of the movable element.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: January 26, 1999
    Assignee: Crouzet Automatismes
    Inventors: Pascal Blind, Abdelkrim Choujaa, Olivier Ngoagouni
  • Process for surface passivation of an indium phosphide substrate and product obtained
    Patent number: 4865656
    Abstract: Surface passivation of indium phosphide substrate. The process consists in:subjecting the substrate to cleaning without application of ultrasounds,soaking, for a duration of between 30 seconds and 10 minutes, the substrate in an aqueous solution of complex arsenic ions maintained at a temperature of between 0.degree. and 50.degree. C.,abundantly rinsing the substrate in deionized water.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: September 12, 1989
    Assignee: Etablissement Public a Caractere Scientifique
    Inventors: Robert Blanchet, Abdelkrim Choujaa, Jacques Chave, Pierre Viktorovitch