Patents Assigned to Donald Chow
  • Spinal support plates
    Patent number: 5647872
    Abstract: A spinal plate is provided that has two components of curvature in the lower surface that opposes the spinal vertebrae. This lower surface preferrably has the shape of a toroidal segment. A series of plates may be taken from a principal "s"-shaped template of similar shape on its lower surface. For convenience of manufacture, the shape of the curvature of the "S"-shaped template along the sides of the template is circular. A special hole pattern is also disclosed in respect of a tapered thoracic portion of the template.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: July 15, 1997
    Assignee: Donald Chow
    Inventors: Stephen Gilbert, Donald Chow, Robin Black, Gordon Armstrong