Patents by Inventor D. Robert Du Be

D. Robert Du Be 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 mandrel and detachable abrasive disk
    Patent number: 4601661
    Abstract: Dental mandrels, circular in cross-section, and detachable abrasive disks useful in confined areas of the mouth, in which the disk can be mounted on and demounted from the mandrel using finger pressure, and the disk can optionally be rotated relative to the mandrel when the mandrel is at rest, but the disk is gripped sufficiently firmly when the mandrel is spinning that no slippage of the disk is apparent under dental grinding conditions.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: July 22, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: D. Robert Du Be, Lawrence A. May