ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,684, issued on July 28, was assigned to Vermeer Manufacturing Co. (Pella, Iowa).

"Additive dosing assemblies and hydro excavation vacuum apparatus incorporating same" was invented by Jacob Keeley (Prairie City, Iowa) and Nathan Meyer (Knoxville, Iowa).

According to the abstract* released by the U.S. Patent & Trademark Office: "Hydro excavation apparatus for excavating earthen material are disclosed. The hydro excavation apparatus includes a first reservoir for holding a base fluid therein, a second reservoir for holding an additive therein, a vacuum system for removing earthen material from an excavation site, and an additive dosing assembly. The additive dosing assembly includes...