Patents by Inventor Kay Perkins Emerson

Kay Perkins Emerson 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).

  • Mathematical instructional aid device
    Publication number: 20030017437
    Abstract: A mathematical instructional aid device for teaching fractions or multiplication, in one embodiment, consists of a circularly shaped base having 12 sections. Each section represents a number from 1 to 12. Each section has within it a number of steps with all the steps of the 12 sections converging to a top most plane. Within each section, each step is spaced from an adjacent step by a number representing a multiple of the base value in the base of each section. Values in steps of different sections are co-planar to assist in understanding the concept of multiplication and fractions.
    Type: Application
    Filed: June 12, 2002
    Publication date: January 23, 2003
    Inventor: Kay Perkins Emerson
  • Mathematical instructional aide device
    Patent number: D471235
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: March 4, 2003
    Assignee: Evan McKenna Foundation
    Inventor: Kay Perkins Emerson