Patents by Inventor Jonathan D. Knopf

Jonathan D. Knopf 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).

  • Hollow tubular device to assist patients during speech therapy
    Patent number: 5507648
    Abstract: A hollow tubular device to assist patients during speech therapy a main body portion of a tubular configuration having a hollow interior with an interior surface and having an exterior surface, the main body portion being formed of a plastic material; a pair of parallel end caps at each end of the main body portion, the end caps being circular in shape with a thickness essentially the same thickness as the side wall; and an centrally disposed aperture extending through each end cap.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: April 16, 1996
    Inventor: Jonathan D. Knopf