Patents by Inventor Frank M. Kretschmar

Frank M. Kretschmar 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).

  • Method and apparatus for producing a dental product
    Patent number: 6968247
    Abstract: A stock removal workshop for the production of a dental restoration product includes a stock removal machine operable to remove stock material from a blank such that there remains a dental product having the desired geometry requisitioned by a dental practice or a dental laboratory. A stock removal plotter controls the stock removal machine operation and converts requisition data received from the dental practice or the dental laboratory which characterizes a virtual model of the requisitioned dental product into control data for controlling the stock removal machine operation. A geometry following assembly characterizes the geometry of the produced dental product via a geometry following operation and a comparison device compares the geometry characterizing data relating to the produced dental product with the requisition data to determine deviations therebetween.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: November 22, 2005
    Assignee: Ivoclar Vivadent AG
    Inventors: Andreas Rathke, Andreas Reindl, Frank M. Kretschmar, Diethard Bertsch
  • Method and apparatus for producing a dental product
    Publication number: 20040143351
    Abstract: A stock removal workshop for the production of a dental restoration product includes a stock removal machine operable to remove stock material from a blank such that there remains a dental product having the desired geometry requisitioned by a dental practice or a dental laboratory. A stock removal plotter controls the stock removal machine operation and converts requisition data received from the dental practice or the dental laboratory which characterizes a virtual model of the requisitioned dental product into control data for controlling the stock removal machine operation. A geometry following assembly characterizes the geometry of the produced dental product via a geometry following operation and a comparison device compares the geometry characterizing data relating to the produced dental product with the requisition data to determine deviations therebetween.
    Type: Application
    Filed: March 25, 2003
    Publication date: July 22, 2004
    Applicant: Ivoclar Vivadent AG
    Inventors: Andreas Rathke, Andreas Reindl, Frank M. Kretschmar, Diethard Bertsch