Patents by Inventor Helen Rettger

Helen Rettger 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).

  • Bottle
    Patent number: D358331
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: May 16, 1995
    Assignee: Schering-Plough Healthcare Products, Inc.
    Inventors: Earl Hoyt, Helen Rettger, Robert C. Johnson
  • Bottle
    Patent number: D361937
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: September 5, 1995
    Assignee: Schering-Plough Health Care Products, Inc.
    Inventors: Robert C. Maxwell, Robert C. Johnson, Josephine Eke, Dieter F. Lay, Helen Rettger