Patents by Inventor Joan Cotter

Joan Cotter 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).

  • Overhead abacus
    Publication number: 20060228680
    Abstract: An abacus including a frame, a plurality of wires supported by the frame, and a plurality of counting members coupled to the wires for movement along the wires. The counting members are substantially translucent so to allow light to pass therethrough.
    Type: Application
    Filed: June 3, 2003
    Publication date: October 12, 2006
    Inventor: Joan Cotter