Patents by Inventor Gregory John Haaser

Gregory John Haaser 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).

  • Hand truck attachment for a ladder
    Patent number: 6328330
    Abstract: A device for attaching to a ladder allows the ladder to function as a hand truck. The device includes a pair of retractable wheels. The retractable wheels can be stored away inside an outer profile of an opened or closed stepladder, so that the wheels do not interfere with a user when the ladder is opened and do not take up space when the ladder is closed. The device may also include a retractable carry platform for holding loads when the ladder is used as a hand truck. A reverse side of the carry platform can serve as a paint bucket support or work surface when the ladder is in use. Both the retractable wheels and the retractable carry platform are attached to the ladder by a frictional engagement which does not violate the structural integrity of the ladder.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: December 11, 2001
    Inventor: Gregory John Haaser