Patents by Inventor Jean-Marie Dupont

Jean-Marie Dupont 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).

  • Integrated single-mode isolator waveguide and application to a semiconductor laser
    Patent number: 5015051
    Abstract: Integrated single-mode isolator waveguide having a heating means (3) making it possible to increase the efficiency of the isolator (1). The invention also provides for an intermediate layer (5) located between the guide layer (1) and the substrate (2). Application: coupling of laser diodes to operation circuits.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: May 14, 1991
    Assignees: Thomson-CSF, L'Etat Francais
    Inventors: Jean-Paul Castera, Paul-Louis Meunier, Alain Carenco, Jean-Marie Dupont, Pierre Friez
  • Filter device utilizing magnetostatic waves
    Patent number: 4565984
    Abstract: The invention relates to devices utilizing magnetostatic waves. The invention has as its object a filter microtape which is able to pick up and selectively dissipate magnetostatic waves as a function of their wavelength. The filter microtape is permeable to waves of which the wavelength is a submultiple of its width. The invention is applicable in particular to tunable magnetostatic wave devices such as delay lines, resonators and oscillators.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: January 21, 1986
    Assignee: Thomson-CSF
    Inventors: Jean-Paul Castera, Jean-Marie Dupont
  • Tunable microwave oscillator using magnetostatic waves
    Patent number: 4318061
    Abstract: Microwave oscillator using magnetostatic surface or bulk waves which can be transmitted in a thin layer of magnetic material having two cavity resonators with coupled gratings of different equivalent lengths in such a way that the first is multimode and the second monomode in the reflection pass band of the gratings, the cavities being arranged in such a way that the second filters the modes transmitted in the first. Microwave signals are applied to one of the two cavities and the resonated waves are collected in the second cavity.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: March 2, 1982
    Assignee: Thomson-CSF
    Inventors: Jean-Paul Castera, Jean-Marie Dupont