Patents by Inventor Jef Dannenberg

Jef Dannenberg 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).

  • Patent number: 7935039
    Abstract: A muscle toning exercise device adaptable from a stationary configuration wherein the device is capable of 360° rotation about a vertical axis, to a movable configuration wherein the device is capable of movement in all directions on a planar surface in addition to 360° rotation. The exercise device includes a handle that extends out from a base that supports the weight of a user. The base of the exercise device contains a series of rolling members that protrude out from the bottom to allow the device to move along the surface upon which the exercise is being performed so that the entire exercise device can be rotated a full 360° about an axis that extends through the center of the device, while further allowing for the displacement of the base, and subsequently the entire exercise device in any direction along a planar surface. A separate cup-shaped base member that rests on the planar surface and in which the exercise device may be selectively installed in covering relation with the rolling members.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: May 3, 2011
    Inventor: Jef Dannenberg