ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,857, issued on June 17, was assigned to Prince Mohammad Bin Fahd University (Dhahran, Saudi Arabia).

"Coaxial multi-disc powder feeder system for multi powder flow and composition control" was invented by Mushtaq Khan (Dhahran, Saudi Arabia), Muhammad Asad (Dhahran, Saudi Arabia) and Muhammad Imran Khan (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A feeder system includes a donut-ring-shaped first wheel having a first groove recessed below its top surface, with a first hopper positioned above to receive material. A first conduit connects the hopper bottom to the groove, defining a feeding path. A mixer unit receives material...