Patents by Inventor Crystal R. Pease

Crystal R. Pease 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).

  • Math facts game apparatus
    Patent number: 5281144
    Abstract: A matrix of discs each having a first end wall spaced from a second end wall, having a cavity therebetween, including a weighted portion to provide for the discs to sink within a body of water, such as a swimming pool. The first and second end walls include contrasting digital enumerations, wherein individuals are addressed math problems and the solutions to the problems are indicated by a numerical sum to be retrieved from within a swimming pool and the like by participating individuals.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: January 25, 1994
    Inventor: Crystal R. Pease