Patents by Inventor Edwin A. Frost

Edwin A. Frost 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).

  • Drawbar
    Patent number: 4844495
    Abstract: A drawbar for pulling a cultipacker for compacting loose earth. The drawbar has a main pulling beam for attachment at a forward end to a plow being drawn by a tractor and at a rearward end to the cultipacker. The drawbar includes an extendible arm connected at one end to the plow and pivotally connected at it's opposite end to the main pulling beam and an extendible leg pivotally connected between the extendible arm and the main pulling beam adjacent it's rearward end thereof.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: July 4, 1989
    Inventor: Edwin A. Frost