Patents by Inventor Herman van Gelderen

Herman van Gelderen 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).

  • Apparatus and method for determining contact lenses
    Patent number: 5414478
    Abstract: Apparatus and method for determining a prescription for contact lenses, comprising in cooperative combination a refractometer and a keratometer, both hooked up to a computer, comprising a program for processing the results obtained from said meters in any desired sequence, optionally supplemented with personal data and the results of a tono-meter and/or vertexmeter in optional sequence. The apparatus and method are also suitable for detecting any requirement for readjustment of the lenses after a period of time of use, comparing the new data with the data stored in the memory of the computer, and providing any readjustment required.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: May 9, 1995
    Inventor: Herman van Gelderen
  • Apparatus and method for determining contact lenses
    Patent number: RE37196
    Abstract: Apparatus and method for determining a prescription for contact lenses, comprising in cooperative combination a refractometer and a keratometer, both hooked up to a computer, comprising a program for processing the results obtained from said meters in any desired sequence, optionally supplemented with personal data and the results of a tono-meter and/or vertexmeter in optional sequence. The apparatus and method are also suitable for detecting any requirement for readjustment of the lenses after a period of time of use, comparing the new data with the data stored in the memory of the computer, and providing any readjustment required.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: May 29, 2001
    Inventor: Herman van Gelderen