Patents by Inventor Andrew G. Popivalo

Andrew G. Popivalo 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 implement having alternately usable tooth and blade assemblies
    Patent number: 4901801
    Abstract: A hand implement for cultivating the surface of the earth, the implement including an elongated shaft which mounts at its distal end a toothed assembly and a blade is mounted on the toothed assembly, the toothed assembly and blade so disposed relative to each other to form a pair of fulcrums interoperable to deploy the toothed assembly and blade for a multiplicity of earth working operations including weeding, permitting weeds to be cut off at uniform depths below the earth's surface or alternatively extracted from the earth in their entirety.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: February 20, 1990
    Assignee: James R. Walton
    Inventor: Andrew G. Popivalo