Patents by Inventor N'Guyen N. Hoan

N'Guyen N. Hoan 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).

  • Detection and imaging of the spatial distribution of visible or ultraviolet photons
    Patent number: 4376892
    Abstract: A gas scintillation proportional counter, with a photosensitive layer, is coupled, through a UV transparent window, to a multi-anode proportional chamber filled with a gas mixture (for instance an argon triethylamine-methane mixture) having a large quantum efficiency for the UV photons. When detecting incident photons, there is obtained the good efficency of photosensitive layers and the satisfactory two-dimensional coordinate localization of multiwire proportional chambers.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: March 15, 1983
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Georges Charpak, N'Guyen N. Hoan, Armando Policarpo, Fabio Sauli