Patents by Inventor Joel A. Hoffman

Joel A. Hoffman 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).

  • Leaf-bagger
    Patent number: 4791779
    Abstract: A leaf receptacle bag is affixed to a vertically disposed support surface that has means for adapting to a leaf conduit. The leaf conduit conveys leaves from a tractor vacuum unit through an orifice in the vertically disposed support surface, the adapter of the conduit directing the leaves diagonally across the interior of the leaf receptacle bag to thereby deposit the leaves at the lower portion of the bag.
    Type: Grant
    Filed: August 25, 1987
    Date of Patent: December 20, 1988
    Inventor: Joel A. Hoffman