Patents by Inventor Francois Duret

Francois Duret 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: 4952149
    Abstract: A method and apparatus for taking impressions of a portion of the body which utilizes the projection of a grid of sinusoidal profile onto the body portion of which the impression is to be taken. The projections are phase-shifted and resulting images are memorized and from the memorized images, the variations in intensity resulting from the phase-shift at each given point can be ascertained to enable the configuration of the region to be calculated.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: August 28, 1990
    Assignee: Hennson International
    Inventors: Francois Duret, Jean-Louis Blouin
  • Patent number: 4742464
    Abstract: A method of making a dental prosthesis in which data representing standard tooth shapes and sizes, relationships between teeth and adjacent and occlusive teeth and characteristics for securing a prosthesis to a prepared site, and machining instructions for shaping a blank to the configuration of a dental prosthesis for direct implantation are stored in a computer memory. After preparing a site in the mouth of a patient to receive a dental prosthesis, the dental surgeon projects optically a grating upon said site in the mouth of the patient and generates an interference pattern representing a holistic impression of said site and its relationship to adjacent structures. The interference pattern is converted into data along x,y,z coordinates in a cartesian coordinate system representing machining of a blank to fit said site and matching data obtained by comparing the impression with the computer standards are used to select a best-fit shape and size.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: May 3, 1988
    Inventors: Francois Duret, Christian Termoz
  • Patent number: 4663720
    Abstract: A method of making a dental prosthesis in which data representing standard tooth shapes and sizes, relationships between teeth and adjacent and occlusive teeth and characteristics for securing a prosthesis to a prepared site, and machining instructions for shaping a blank to the configuration of a dental prosthesis for direct implantation are stored in a computer memory. After preparing a site in the mouth of a patient to receive a dental prosthesis, the dental surgeon projects optically a grating upon said site in the mouth of the patient and generates an interference pattern representing a holistic impression of said site and its relationship to adjacent structures. The interference pattern is converted into data along x,y,z coordinates in a cartesian coordinate system representing machining of a blank to fit said site and matching data obtained by comparing the impression with the computer standards are used to select a best-fit shape and size.
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: May 5, 1987
    Inventors: Francois Duret, Christian Termoz
  • Patent number: 4611288
    Abstract: Dental prostheses, such as crowns, inlays or dentures are produced automatically based upon an optical impression taken of the oral region wtih nontraumatic radiation. The reflected waves are transformed into numerical data which is used directly to operate a numerically controlled machine in the fabrication process. The process is pertinent to other medical applications as well.
    Type: Grant
    Filed: April 14, 1983
    Date of Patent: September 9, 1986
    Inventors: Francois Duret, Elisabeth Duret nee Michallet, Christian Thermoz