Patents by Inventor Stefan Ahlqvist

Stefan Ahlqvist 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).

  • Adaptive filter model for motor vehicle sensor signals
    Patent number: 7158866
    Abstract: A sensor system for combining first and second sensor signals, and generating a physical parameter values dependent on said sensor signals used in autocalibrating sensors improving the performance and quality of existing sensor signals and virtual sensors realizing new sensors by combining and integrating in adaptive filter models sensor signals representing same or different types of physical parameters.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: January 2, 2007
    Assignee: Nira Dynamics AB
    Inventors: Fredrik Gustafsson, Stefan Ahlqvist, Marcus Drevö, Urban Forssell, Niclas Persson
  • Adaptive filter model for motor veichle sensor signals
    Publication number: 20040199300
    Abstract: A sensor system for combining first and second sensor signals, and generating a physical parameter values dependent on said sensor signals used in autocalibrating sensors improving the performance and quality of existing sensor signals and virtual sensors realising new sensors by combining and integrating in adaptive filter models sensor signals representing same or different of physical parameters.
    Type: Application
    Filed: January 9, 2003
    Publication date: October 7, 2004
    Inventors: Fredrik Gustafsson, Stefan Ahlqvist, Marcus Drevo, Urban Forssell, Niclas Persson
  • Navigation system for data structures
    Publication number: 20040066413
    Abstract: A data structure is mapped on a two-dimensional display by providing a first view having a first number of products displayed therein, and a second view having a second number of products displayed therein. The first number is greater than the second number. In the first view, a first segment of the first view is selected by placing a cursor in a first place in the segment and activating the cursor. The second view is displayed so that the second view is centered at the first place. The second view is an enlargement of the first segment of the first view.
    Type: Application
    Filed: July 16, 2003
    Publication date: April 8, 2004
    Inventor: Stefan Ahlqvist