Patents by Inventor Thomas L. Johnston

Thomas L. Johnston 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).

  • Therapeutic leveraging device
    Patent number: 5286242
    Abstract: An apparatus for flexing a knee capsule of a human body which contains a device for grasping a foot, a thigh strap, a first line cord, and a second line cord, a handle, and eight separate guides for guiding line cord is disclosed. This device may readily be used by a patient to rehabilitate a damaged knee capsule.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: February 15, 1994
    Assignee: Mechanical Advantage Ltd.
    Inventor: Thomas L. Johnston
  • Therapeutic leveraging device
    Patent number: 5253639
    Abstract: A device for flexing a person's knee joint is described. The device contains a seat harness, an element for grasping the foot of a user, line cord, and an element for connecting the seat harness to the line cord. Movement of the line cord by the user causes movement of the foot grasping element.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: October 19, 1993
    Assignee: Mechanical Advantage Ltd.
    Inventor: Thomas L. Johnston
  • Therapeutic leveraging device
    Patent number: 5076576
    Abstract: An apparatus for stretching a joint of the human body (such as a knee joint) is disclosed. This apparatus contains an extension harness, a line cord, a first guide for the line cord which preferably is attached to the harness (such as grommets in the harness or pulley blocks attached to the harness), a second guide for the line cord (such as a pulley system, or an eye hook), and an anchor. When the harness secured around a patient's knee and attached to an anchoring surface, movement of the line cord causes movement of the harness.
    Type: Grant
    Filed: January 7, 1991
    Date of Patent: December 31, 1991
    Inventor: Thomas L. Johnston