Patents by Inventor David Fill

David Fill 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 vacuum system with foot-actuated valve
    Patent number: 5908297
    Abstract: A dental vacuum system having a foot-actuated valve for controlling the flow of vacuum through the system. The foot-actuated valve is located away from the field of operation such that the valve is not exposed to the typical sources of pathogenic contaminants in a dental office.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: June 1, 1999
    Assignee: David Fill, D.D.S.
    Inventors: David Fill, Robert J. Krupinski