Patents by Inventor Leo H. Eckstein

Leo H. Eckstein 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).

  • Baby hearing tester
    Patent number: D298773
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: November 29, 1988
    Inventors: Leo H. Eckstein, Joel Eckstein
  • Headband for earphones
    Patent number: D376151
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: December 3, 1996
    Inventor: Leo H. Eckstein
  • 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