Patents by Inventor David A. Vik

David A. Vik 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).

  • Methods and chair for supporting the back of a seated person
    Patent number: 6692081
    Abstract: Method and apparatus for supporting the back of a seated person by providing primary support to the back of the seated person at the junction between the lower thoracic vertebrae and the upper lumbar vertebrae and surrounding tissues. More specifically, the primary support is preferably provided to the spine in a target region between the 11th thoracic vertebrae and the 2nd lumbar vertebrae of a user of the chair, and more preferably between the 1st lumbar vertebrae and the 12th thoracic vertebrae.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: February 17, 2004
    Inventor: David Vik
  • Methods and chair for supporting the back of a seated person
    Publication number: 20010054836
    Abstract: Method and apparatus for supporting the back of a seated person by providing primary support to the back of the seated person at the junction between the lower thoracic vertebrae and the upper lumbar vertebrae and surrounding tissues. More specifically, the primary support is preferably provided to the spine in a target region between the 11th thoracic vertebrae and the 2nd lumbar vertebrae of a user of the chair, and more preferably between the 1st lumbar vertebrae and the 12th thoracic vertebrae.
    Type: Application
    Filed: June 22, 2001
    Publication date: December 27, 2001
    Inventor: David Vik
  • Digitally-controlled pulse shaper for pulsed radar systems and radar wind profilers
    Patent number: 5920282
    Abstract: A digitally-controlled pulse shaper (DCPS) is provided which precisely controls the shape of the leading and trailing edges of a transmit pulse in a radar wind profiler, or pulsed-radar. In the case of pulse coding, where phase transitions are used to segment an otherwise longer pulse, the intra-pulse phase transitions are also shaped.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: July 6, 1999
    Assignee: Radian International LLC
    Inventors: David A. Vik, John William Neuschaefer, K. Russell Peterman