Patents Assigned to Sterndent Corp.
  • Dental stress-relieving apparatus
    Patent number: 4205442
    Abstract: A two-part stress-reliever employs a first member supporting an upright flange and a second member bifurcated and straddling said flange. An elongated slot in the flange receives a pass-through pivot pin carried by the second member and said slot also includes a resilient body biasing the pivot pin to its normal unstressed position in said slot.
    Type: Grant
    Filed: April 19, 1978
    Date of Patent: June 3, 1980
    Assignee: Sterndent Corp.
    Inventor: Eric H. Zahn
  • Method of stippling, and stippling mandrel therefor
    Patent number: 4109385
    Abstract: A rotatable mandrel is provided for stippling various surfaces, including the surface of plastic material, and is disclosed as comprising a cluster of burrs symmetrically arranged about the axis of rotation of the mandrel.
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: August 29, 1978
    Assignee: Sterndent Corp.
    Inventors: Eric H. Zahn, Philip W. Martin