Patents by Inventor David D. Karlstrom

David D. Karlstrom 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).

  • Strength and power training system
    Patent number: 7104936
    Abstract: A weight machine is used for acceleration movement of heavy weights, and jumping and throwing exercises. The weight machine includes a hydraulic cylinder that will retard movement of the weight under gravity, and will permit free movement against the force of gravity.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: September 12, 2006
    Inventor: David D. Karlstrom
  • Strength and power training system
    Publication number: 20040242383
    Abstract: A weight machine is used for acceleration movement of heavy weights, and jumping and throwing exercises. The weight machine includes a hydraulic cylinder that will retard movement of the weight under gravity, and will permit free movement against the force of gravity.
    Type: Application
    Filed: May 27, 2003
    Publication date: December 2, 2004
    Inventor: David D. Karlstrom