Patents by Inventor Freek Stoffelen

Freek Stoffelen 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).

  • Inferential temperature measurement of an electrochromic device
    Patent number: 6856444
    Abstract: An electrochromic device driver system having inferential temperature measurement of the electrochromic device. The inferred temperature measurements enable the system to determine the maximum but safe driving voltages to improve the speed of varying the transmissivity levels of the electrochromic device without damaging the device.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: February 15, 2005
    Assignee: Sage Electrochromics, Inc.
    Inventors: James F. Ingalls, Freek Stoffelen
  • Inferential temperature measurement of an electrochromic device
    Publication number: 20030210449
    Abstract: An electrochromic device driver system having inferential temperature measurement of the electrochromic device. The inferred temperature measurements enable the system to determine the maximum driving voltages to improve the speed of varying the transmissivity levels of the electrochromic device without damaging the device.
    Type: Application
    Filed: May 10, 2002
    Publication date: November 13, 2003
    Inventors: James F. Ingalls, Freek Stoffelen