A screw-type, in-ground anchor device for anchoring an above-ground upright. A generally cylindrical drive shaft includes an upper cylindrical housing portion constructed of -inch rolled steel with an inside diameter sized to match the outside diameter of the upright. A conical portion connects the upper...http://www.google.ca/patents/US6412235?utm_source=gb-gplus-sharePatent US6412235 - Removable screw-type, in-ground anchor device
