Patents by Inventor Dennis L. Larson

Dennis L. Larson 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: 6657544
    Abstract: The present invention discloses a method and apparatus for electronically deterring an animal from approaching an exclusion area around an exclusion unit or from entering or leaving an area bounded by a wire. The animal is provided with a collar unit, which includes a sensor adapted to sense the strength of electromagnetic signals generated by the exclusion unit or wire and a correction unit adapted to provide correction to the animal in response to a sensor output. The portable unit reports to a central controller which selects a correction strategy, such as level of correction to be applied to the animal approaching the perimeter. The controller provides warnings to the user, including warnings for when the battery in the collar unit goes low and when the animal stays in a correction zone for too long. The controller may control a number of exclusion units and/or power units, and may select an appropriate correction for one of a plurality of animals.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: December 2, 2003
    Assignee: Joint Techno Concepts International, Inc.
    Inventors: James R. Barry, John S. Titus, Dennis L. Larson
  • Patent number: 6600422
    Abstract: The present invention discloses a method and apparatus for electronically deterring an animal from approaching an exclusion area around an exclusion unit or from entering or leaving an area bounded by a wire. The animal is provided with a collar unit, which includes a sensor adapted to sense the strength of electromagnetic signals generated by the exclusion unit or wire and a correction unit adapted to provide correction to the animal in response to a sensor output. The portable unit reports to a central controller which selects a correction strategy, such as level of correction to be applied to the animal approaching the perimeter. The controller provides warnings to the user, including warnings for when the battery in the collar unit goes low and when the animal stays in a correction zone for too long. The controller may control a number of exclusion units and/or power units, and may select an appropriate correction for one of a plurality of animals.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: July 29, 2003
    Assignee: Joint Techno Concepts International, Inc.
    Inventors: James R. Barry, John S. Titus, Dennis L. Larson
  • Patent number: 4278118
    Abstract: The present invention relates to a log splitting apparatus utilizing a hydraulic cylinder mounted onto a main frame member and having a movable pusher portion that forces log sections against an upright cutting blade. The main frame member is tubular and also forms the hydraulic reservoir for the hydraulic system used with the cylinder. The entire splitter assembly is mounted onto mounting brackets which permit the splitter assembly to be placed onto a graden tractor with the axis of the power cylinder crossways to the longitudinal (fore and aft) axis of the garden tractor for compact assembly. The splitter assembly is self-contained and is powered directly from the power take-off of such garden tractor.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: July 14, 1981
    Inventor: Dennis L. Larson