Patents by Inventor Ruth M. Mericle

Ruth M. Mericle 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).

  • Toothshaped sand timer
    Patent number: D258806
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: April 7, 1981
    Inventors: Ruth M. Mericle, Marjorie M. A. Mericle