Patents by Inventor William H. Conaway

William H. Conaway 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).

  • Tristimulus colormeter with internal reflectance compensation
    Patent number: 4131367
    Abstract: A tristimulus colorimeter employs a multiplexed dual slope integrator digital voltmeter wherein unknown and reference light beams are compared by sequentially applying unknown and reference electrical signals representative of the two respective light beams to the non-inverting and inverting inputs, respectively, of the integrator amplifier. Moreover, a compensating circuit provides for compensation of the colorimeter output signals with respect to reflectance error encountered in the optics portion of the colorimeter with such compensation being provided as a function of the light intensity from the colorimeter light source.
    Type: Grant
    Filed: November 2, 1976
    Date of Patent: December 26, 1978
    Assignee: Sterndent Corporation
    Inventors: Park French, William H. Conaway
  • Tristimulus colorimeter
    Patent number: 4125329
    Abstract: A tristimulus colorimeter employs a multiplexed dual slope integrator digital voltmeter wherein unknown and reference light beams are compared by sequentially applying unknown and reference electrical signals representative of the two respective light beams to the non-inverting and inverting inputs, respectively, of the integrator amplifier. Moreover, a compensating circuit provides for compensation of the colorimeter output signals with respect to reflectance error encountered in the optics portion of the colorimeter.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: November 14, 1978
    Assignee: Sterndent Corporation
    Inventors: Park French, William H. Conaway