Patents Assigned to Knox Security Engineering Corp.
  • Self cleaning pet litter box
    Patent number: 5931119
    Abstract: A self cleaning pet litter box for receiving animal waste including an upwardly open pan containing cat litter being mounted for rotation on a support frame, a collection container for receiving animal waste removed from the pan, a raking mechanism for gathering and removing animal waste from the rotating cat litter pan into the collection container. A supply chamber replenishes litter to the pan. The litter box includes an electronic control system including an electro-optical intrusion detector.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: August 3, 1999
    Assignee: Knox Security Engineering Corp.
    Inventors: Ofer Nissim, Eric Schade, Martin Hoffmann