Patents by Inventor T. Robert Perrett

T. Robert Perrett 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).

  • Device for producing a hole in a bone
    Patent number: 4341206
    Abstract: A tool for forming a stepped blind hole in bone for receipt of a fracture reducing and stabilizing surgical implant. The tool comprises a small diameter drill portion axially adjustable with respect to a larger diameter reamer portion. A conical portion includes cutting surfaces to chamfer the entrance of the hole and also includes non-cutting portions which serve to limit penetration of the tool into the bone. The tool is cannulated to allow its use in conjunction with a previously installed Kirschner guide wire.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: July 27, 1982
    Assignee: Synthes AG
    Inventors: T. Robert Perrett, Franz Sutter, Paul Gisin