Patents by Inventor Mark L. Purnell

Mark L. Purnell 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).

  • Patent number: 4883048
    Abstract: Apparatus and methods for use in performing surgical operations such as anterior or posterior cruciate ligament reconstructions wherein the apparatus has means for positioning a target area at the center of an arc of a circle so that when the target area is positioned at a location relative to the anatomical center of the original attachment of the cruciate ligaments on the tibia and femur bones, kirschner wires may be pushed through guide means having a longitudinal axis coinciding with a ray emanating from the center of the circle and indicate the proper location for holes in the tibia and femur for the proper attachment of a cruciate ligament graft substitute. The apparatus is also used in the placement of kirschner wires to serve as guide wires in the performance of an osteotomy.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: November 28, 1989
    Inventors: Mark L. Purnell, Robert R. Oden, William L. McCune, Michael E. Berkeley
  • Patent number: 4781182
    Abstract: Apparatus and methods for use in performing surgical operations such as anterior or posterior cruciate ligament reconstructions wherein the apparatus has means for positioning a target area at the center of a an arc of a circle so that when the target area is positioned at a location relative to the anatomical center of the original attachment of the cruciate ligaments on the tibia and femur bones, kirschner wires may be pushed through guide means having a longitudinal axis coinciding with a ray emanating from the center of the circle and indicate the proper location for holes in the tibia and femur for the proper attachment of a cruciate ligament graft substitute. The apparatus is also used in the placement of kirschner wires to serve as guide wires in the performance of an osteotomy.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: November 1, 1988
    Inventors: Mark L. Purnell, Robert R. Oden, William L. McCune, Michael E. Berkeley