Patents by Inventor Martin Raymond Mattlage

Martin Raymond Mattlage 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).

  • Circular chess system
    Patent number: 6592123
    Abstract: A circular chess system is disclosed wherein an extra diameter is included which through voiding a variable number of spaces changes the play and control of the game. There are three main versions of play, maximal, medial, and minimal with 70, 68 and 66 spaces of play respectively.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: July 15, 2003
    Inventors: Alan Roy Mattlage, Martin Raymond Mattlage
  • Circular chess board
    Patent number: D456456
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: April 30, 2002
    Inventors: Alan Roy Mattlage, Martin Raymond Mattlage