Patents by Inventor Benjamin Van Druff

Benjamin Van Druff 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).

  • Track with moveable trolley for tethering and restraining an animal
    Patent number: 5339773
    Abstract: A semi-permanent apparatus and a method for tethering and restraining grazing animals, house pets and security dogs comprises a moveable trolley mounted on a track attached to a solid surface, such as the ground. One end of a tether is attached to the animal and the other end of the tether is attached to the trolley. The trolley moves along the track when the animal tugs at the tether, but the track, trolley and tether prevent the animal from roaming to a distance from the track beyond the length of the tether.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: August 23, 1994
    Inventor: Benjamin Van Druff