Patents by Inventor Ruth E. Ledbetter

Ruth E. Ledbetter 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).

  • Patent number: D337729
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: July 27, 1993
    Inventor: Ruth E. Ledbetter