Gordon A Hanson, Age 816219 17Th St N, Fargo, ND 58102

5188121, Feb 23, 1993

Dec 18, 1990

7/629232

Gordon N. Hanson - Roseville MN

A61B 5103

128781

An apparatus for measuring the range of angular body motion about at least one axis of rotation. The apparatus includes a base with a first portion having means for engaging the body to provide a first reference point for measurement. A second portion of the base extends outward from the body generally perpendicular to the axis of rotation. A measurement member is positioned adjacent to the second portion of the base and is rotatably mounted to the base at the first reference point. The measurement member moves relative to the second portion of the base as the measurement member is pivoted about the axis of rotation. A slide arm is slidably mounted on the measurement member for sliding movement along a line substantially parallel to the plane of rotation of the measurement member. The slide arm has an outer end which is spaced from the measurement member and engages the body at a second reference point on an opposite side of the axis from the first reference point and there is measurable pivotal movement of the measurement member as the body is moved about the axis of rotation. A second portion of the apparatus uses angle indicators for measuring rotations of the spine about an upright axis and side to side pivotal movement.

4928709, May 29, 1990

Apr 27, 1988

7/186795

John D. Allison - Shoreview MN
Gordon Hanson - Roseville MN

Regents of the University of Minnesota - Minneapolis MN
Performance Attainment Associates, Inc. - Roseville MN

A61B 510

128782

A device and process for measuring cervical range of motion about three axes comprises a frame which is supported on the nose of a subject and which has side temple pieces for locating the frame on the wearer's head. Cervical range of motion of a wearer's head can be measured through the use of gravity type angle meters and a magnetic type angle meter which are mounted on the frames and easily referenced back to the frame. The magnetic type angle meter is mounted above the head on a removable arm, which is supported on the frame. A magnetic field is created using magnets mounted on the subject to obtain reliable head rotation readings. The magnetic type angle meter can be removed, and an arm which is mounted on the frame and extends above the head of a wearer and which when coupled with a locator arm can determine a forward head position measurement.