Patents by Inventor Michael Nathanson

Michael Nathanson 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: 6074343
    Abstract: A surgical tissue retractor for use in small tissue incisions such as heart valve surgery. The retractor is comprised of a plurality of retractor blades that can be operated simultaneously or at least one or more blades can be operated independently. Right and left retractor blades are mounted on an actuator mechanism that spreads or expands the blades as a rotatable primary actuator knob is rotated. A third retractable arm is mounted for simultaneous operation with the right and left retractor blade or independent operation through a secondary rotatable actuator knob that extends or retracts a threaded shaft attached to the center retractor blade. The retractor includes a housing having a hangar for use of the retractor in conjunction with a larger retractor such as a sternum spreader or rib spreader retractor.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: June 13, 2000
    Inventors: Michael Nathanson, Tibor B. Koros, Gabriel J. Koros
  • Patent number: D443359
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: June 5, 2001
    Inventors: Michael Nathanson, Tibor B. Koros, Gabriel J. Koros
  • Patent number: D430294
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: August 29, 2000
    Inventors: Michael Nathanson, Tibor B. Koros, Gabriel J. Koros