Patents by Inventor Donald E. Hallman

Donald E. Hallman 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).

  • Patent number: 3951212
    Abstract: A sod cutter having an annular body with a tapered, sharpened annular cutting edge, a support sleeve and a shaft journaled in the sleeve and projecting into the annular body. The shaft has a external handle thereon and the shaft is movable relative to the sleeve and the annular body longitudinally and rotatably. The shaft carries a cutting blade thereon to cut the turf in a spiral manner as the shaft is extended into the annular body with the cutting edge of the annular body defining the periphery of the turf plug to be removed and the blade cutting and retaining the plug within the annular body.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: April 20, 1976
    Inventor: Donald E. Hallman