Patents by Inventor Rolf Pfoertner

Rolf Pfoertner 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: 8887777
    Abstract: Disclosed herein is a coupling system for a tire traction device comprising: a first wedge block, a second wedge block, a first wedge receiver and a second wedge receiver. In one example, each wedge block includes a surface defining a tie receiver. Also disclosed are first and second wedge receivers. Also disclosed is a tire traction device and a method for producing the tire traction device. The tire traction device removably attached to a vehicle tire or wheel. The traction device in one example comprising: a tread portion comprising a tread surface, the tread portion comprising a first material; a plurality of sidewall portions, the sidewall portions comprising a second material; wherein the tread portion and sidewall portions are cast in a single mold as a unitary structure.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: November 18, 2014
    Inventor: Rolf Pfoertner
  • Patent number: D325896
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: May 5, 1992
    Inventor: Rolf Pfoertner