Patents by Inventor Stephen Koster

Stephen Koster 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).

  • Tree delimber
    Patent number: 6729372
    Abstract: A delimber (10) for removing secondary limbs from a primary limb of a tree Comprises an arm (12) arranged to extend around the primary limb. The arm is provided with cutter segments (18) oriented to cut the secondary limbs from the primary limb of the tree. The delimber also comprises a means (50, 52, 54) for moving the arm at least partly along the length of the primary limb. In use, the arm is extended around the primary limb of the tree and is then moved along the length of the primary limb, thereby cutting secondary limbs from the primary limb.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: May 4, 2004
    Inventors: Susan Koster, Stephen Koster