Patents by Inventor Marcel J. Boulais

Marcel J. Boulais 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).

  • Laser beam level control with automatic override
    Patent number: 4263973
    Abstract: A laser beam level control system for an earth-moving machine is provided with an automatic override function to temporarily block blade-down signals and raise the blade when lowering it or leaving it at its previous height would increase the force required to drive the machine across the ground above a preselected value which does not exceed the tractional force capability of the machine's drive wheels or exceed the machine's available horsepower.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: April 28, 1981
    Inventors: Marcel J. Boulais, Richard A. Boulais
  • Laser beam level control with automatic override
    Patent number: 4173258
    Abstract: A laser beam level control system for an earth-moving machine is provided with an automatic override function to temporarily block blade-down signals and raise the blade when lowering it or leaving it at its previous height would increase the force required to drive the machine across the ground above a preselected value which does not exceed the tractional force capability of the machine's drive wheels or exceed the machine's available horsepower.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: November 6, 1979
    Inventors: Marcel J. Boulais, Richard A. Boulais