Patents by Inventor Carl Risberg, Jr.

Carl Risberg, Jr. 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).

  • Entertainment and exercise device
    Patent number: 4076235
    Abstract: The present invention provides an entertainment and exercise device comprising an open-topped body formed of at least one body-forming wall, the body-forming wall forming a rounded bottom pivot point and extending upwardly and tapering outwardly therefrom and having a generally elliptical configuration, and a top portion which forms an angle with the vertical axis of the elliptically shaped portion greater than the angle formed by the elliptical portion.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: February 28, 1978
    Inventor: Carl Risberg, Jr.