Patents by Inventor Bogha S. Virk

Bogha S. Virk 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).

  • Stair lift
    Patent number: 5217089
    Abstract: A motor driven stair lift device is driven along the tubular track filled with transmission elements comprising incompressible spheres driven by a worm. Drive spheres affixed to a carrier and disposed in a portion of the track are driven with the transmission elements, causing movement of the carrier along the track.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: June 8, 1993
    Inventor: Bogha S. Virk