Patents by Inventor Harlan L. Halvorson

Harlan L. Halvorson 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: 4429846
    Abstract: An adjustable tree stand including a support having a circular bottom with a wall at the periphery thereof. A series of legs are connected to the wall and a band for connection with a tree trunk. A circular plate is positioned on the circular bottom with the axis located centrally and substantially perpendicular to the plate coinciding with the central, vertical axis of the bottom. A spike is secured to the top of the plate offset from the axis of the plate. A pair of spaced flanges are formed on the plate for rotation of the plate on the support bottom to cant a tree having the spike inserted upwardly into the bottom end of the tree.
    Type: Grant
    Filed: June 22, 1981
    Date of Patent: February 7, 1984
    Inventor: Harlan L. Halvorson