Patents by Inventor Evelyn De La Paz Rios

Evelyn De La Paz Rios 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).

  • Method for teaching multiplication and division with numbers 6 through 9
    Patent number: 4583952
    Abstract: A teaching methodology provides the student with hand conformed symbols representative of the numbers 6 through 9. Observation of these symbols permits the students to use their mastery of multiplication of the numbers 1 through 5 and 10 to solve problems in multiplication and division involving the numbers 6 through 9.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: April 22, 1986
    Inventor: Evelyn De La Paz Rios