ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,958, issued on Nov. 3.

"Mixing device for a gas heater" was invented by Job Rutgers (Apeldoorn, Netherlands) and Andrea Pisoni (Apeldoorn, Netherlands).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a gas heater mixing device for a gas heater, comprising a mixing element for mixing gas and fuel gas, a gas line for supplying gas into a chamber of the mixing element, a fuel gas line for supplying fuel gas into the chamber and a moveable valve body, wherein the valve body is arrangeable between different positions for controlling the mixed gas flow that can flow through an outlet opening of the mixing element. The gas heater mixi...