ALEXANDRIA, Va., April 9 -- United States Patent no. 12,270,159, issued on April 8, was assigned to Ligchine International Corp. (Floyds Knobs, Ind.).
"Swing boom concrete screeding apparatus" was invented by Peter A. Ligman (Darien, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly i...