Patents by Inventor Robert T. Herrema

Robert T. Herrema 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: 5941018
    Abstract: A landscape edging system includes a horizontally elongate edging strip having opposing sides, a tab projecting from a side of the edging strip, and a vertically elongate stake. The tab includes a first portion which extends away from the side of the edging strip and a second portion which extends substantially in a longitudinal direction of the elongate edging strip in spaced relationship from a vertical plane generally defined by the side of the edging strip from which the tab projects. The elongate stake includes at least one edge portion having a thickness approximately equal to a distance between the vertical plane generally defined by the side of the edging strip from which the tab projects and the portion of the tab which extends in the direction of the elongate edging strip. The system allows opposing sides of the edge portions of the stake to be engaged by and retained between the edging strip and the tab.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: August 24, 1999
    Inventor: Robert T. Herrema
  • Patent number: 5020272
    Abstract: An area edging system comprising a self-coupling edging strip two ends of which can be slidably connected together on either sides of each other. Also provided is a novel support stake that can be snap fastened to an edging strip and securely fastened thereto and securely held in the ground. Also provided are modular coupling members for forming sharp radius curves, sharp angle corners and mid-span coupling.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: June 4, 1991
    Inventors: Robert T. Herrema, Steven C. Windemuller