Patents by Inventor Leo H. Eckstein, deceased

Leo H. Eckstein, deceased 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).

  • Hearing test instrument
    Patent number: D417278
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: November 30, 1999
    Assignee: Eckstein Family Trust
    Inventor: Leo H. Eckstein, deceased