Patents by Inventor Randall B. Christensen

Randall B. Christensen 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).

  • Batting practice device
    Patent number: 5238241
    Abstract: A ball batting practice device wherein a practice ball is swung in an orbit at the end of a tether, having a elastic shock-absorbing link and a non-elastic link having a length greater than the elastic link, and placed in parallel with the elastic link. An easily grasped and retained hand-gripping assembly is attached at another end of the tether.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: August 24, 1993
    Inventor: Randall B. Christensen