Patents by Inventor Philip A. Zeidman

Philip A. Zeidman 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).

  • Landscaping block
    Patent number: 5072566
    Abstract: A landscaping block for a retaining wall includes a bottom wall, a pair of side walls, first and second end walls, and upper and lower steps on the side walls for interlocking with overlying and underlying blocks. The blocks also include a transversely extending step that extends downwardly from one end of the bottom wall for engaging an underlying block while preventing a front wall of an overlying block from contacting the front wall of the underlying block.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: December 17, 1991
    Inventor: Philip A. Zeidman
  • Retaining wall block
    Patent number: D310267
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: August 28, 1990
    Inventor: Philip A. Zeidman