Patents by Inventor Charles J. Lindenberger

Charles J. Lindenberger 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).

  • Patent number: 4204322
    Abstract: Apparatus for securing a denture plate in position is disclosed. The illustrated and preferred embodiment incorporates a vacuum pump which has the exterior form and shape of a tooth embedded in a denture plate. The tooth incorporates a reciprocally operated pump. The pump pulls air from an exposed, lower indention or chamber. This chamber is connected via multiple passages to similar chambers around the denture, all of the chambers collectively open to the gum of the wearer. As air is evacuated from the chambers, a vacuum is formed. The vacuum increases holding power of the denture against the gum.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: May 27, 1980
    Inventors: John N. Johnson, Charles J. Lindenberger