Patent for a simple and durable grubber that has "a frame preferably carrying a caster-wheel at front, guiding-handles at rear, vertical cutting knives or shares at its sides, penetrating shares or points at the lower ends of said knives, and a transverse or horizontal knife or share at rear of said points, preferably in substantially the same plane therewith, and adjustable mounted to be tilted or inclined out of the horizontal and adjusting handles for the transverse share" (lines 20-30).