Patents by Inventor Bruce R. Sanford

Bruce R. Sanford 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).

  • Multiple choices mathematical game apparatus
    Patent number: 5083793
    Abstract: A mathematical game apparatus includes a game board having a plurality of concentric circles providing paths or playing paths divided into a plurality of sections, each section being provided with indicia (numerals) therein for the purpose of having the players learn and/or improve their ability to count from 1 to 125 by multiple units in addition to increasing their acuity in utilizing prime numbers and factors; perfect squares and cubes; and exponential powers of 10.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: January 28, 1992
    Inventor: Bruce R. Sanford