Nope, Piper was not involved in this.
These and a few othe twin experimental Pipers were the brainchild of Mr. Harold Wagner of the Wagner Aircraft Co. at Troh's Skyport, Portland, Oregon.
Good history found here on the Wagner Twins and several other ...creative... projects by other clever and maybe a little bit silly people.
http://www.twinnavion.com/oddballs.htm