Patents Assigned to HMW Industries, Inc.
  • Palatal expander
    Patent number: 4045871
    Abstract: Disclosed is a device useful by an orthodontist for expanding a human palate. It comprises a stationary body secured to an anchor tooth on one side of the palate and a movable block secured to an anchor tooth on the other side of the palate. A helical spring urges the two apart to expand the palate. A keeper holds them together until they are fixed in place by the orthodontist.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: September 6, 1977
    Assignee: HMW Industries, Inc.
    Inventor: John E. Nelson
  • Magnetic tooth straightener
    Patent number: 4017973
    Abstract: Disclosed is a permanent magnet tooth straightener. Nuts are attached by bands to an anchor tooth and a mobile tooth. Screws are threaded into each nut and axially aligned. The screws are permanent magnets so that their adjacent ends form interacting magnet poles which may either attract or repell each other. As the position of the mobile tooth changes the screws may be rotated to adjust the magnetic force acting between the teeth.
    Type: Grant
    Filed: June 16, 1976
    Date of Patent: April 19, 1977
    Assignee: HMW Industries, Inc.
    Inventor: John E. Nelson