Patents by Inventor Dave Hassenfritz

Dave Hassenfritz 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).

  • Planter attachment
    Patent number: 4466364
    Abstract: The invention relates to agricultural implements for planting. Increased efficiency of planting in general and incorporating fertilizer in particular in no-till situations is achieved by frame, disk and knife assemblies (14, 15, 16) mounting a disk (44) immediately ahead of a knife (68) and depth-controlled by a spring (63).
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: August 21, 1984
    Inventor: Dave Hassenfritz