Patents by Inventor Ronald Dubis

Ronald Dubis 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).

  • Tray for use with ladders
    Patent number: 4662594
    Abstract: A tray for use with ladders having hollow rungs opening to the side is disclosed, with the device being supported by a resilient member which is inserted into the rung and expanded against the inside of the rung by applying a compression force to the ends of the member, which holds the device firmly in place. The particular means for expanding the member disclosed herein uses the resilient characteristic of the member to "lock" the device in place.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: May 5, 1987
    Inventor: Ronald Dubis