ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,557,721, issued on Feb. 24, was assigned to ROBERTS WELDING & FABRICATING LTD. (Woodstock, Canada).

"Removably mounted plow for elongated tubular materials" was invented by Robert W. H. Hall (Embro, Canada), David C. Princz (Paris, Canada) and Wilfred H. M. Berg (Woodstock, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system for installation of continuous elongated tubular material in the ground involves: an agricultural tractor having a rear three-point tractor hitch, a rear drawbar and rotatable elastomeric ground-engaging interfaces; a plow mount comprising a front three-point mount hitch for connection to the rear three-point tractor hitc...