Patents by Inventor Robert A. Libby

Robert A. Libby 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: D274839
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: July 24, 1984
    Assignee: Associated Auditory Instruments, Inc.
    Inventor: E. Robert Libby