Patents by Inventor Martin Gaskell

Martin Gaskell 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).

  • Operations processor
    Patent number: 5007840
    Abstract: An operations processor for facilitating memory of the 12 times table. The operations processor comprises two concentric cylinders, the inner cylinder having marked thereon a periodical array of numbers. The outer clinder arranged for indicating one of the operands and the solution to a particular multiplication. A user merely twists and raises or lowers the inner cylinder with respect to the outer cylinder thereby displaying any sum of the 12 times table.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: April 16, 1991
    Inventor: Martin Gaskell