Patents by Inventor Ulrich Riewenherm

Ulrich Riewenherm 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).

  • Dental suction cannula
    Patent number: 5490780
    Abstract: A dental suction cannula comprises a suction conduit which carries a protection head. The protection head is U-shaped and forms a space for receiving the tooth ridge of the patient's mouth. A suction opening of the conduit communicates with that space to suction moisture therefrom. Inner surfaces of the protection head have a mirror finish to reflect light.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: February 13, 1996
    Inventor: Ulrich Riewenherm