Patents by Inventor Jonathan A. Holmgren

Jonathan A. Holmgren 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: 5864059
    Abstract: A snow probe device with a portable data logger that measures snow depths snow covered areas. The snow probe componets include: i) a linear displacement magnetostrictive transducer composed of a long probe shaft with an internal magnetostrictive transducer filament that operates in conjunction with a small electronics package for signal generation and detection; ii) a floating plate assembly that includes a magnet that slides on the probe shaft along with a floating plate that rests upon the snow's surface during a measurement event; iii) a pointed tip designed for easy penetration of snow attached at the probe's bottom end portion; iv) a thumb switch for actuating measurements on a cylindrical handle attached at the upper end of the probe shaft; and v) a data logger for controlling and recording the magnetostrictive transducer measurements.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: January 26, 1999
    Assignee: The Army Corps of Engineers as represented by the Secretary of the Army
    Inventors: Matthew Sturm, Jonathan A. Holmgren