ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,540, issued on June 23, was assigned to Tyco Fire Products LP (Cranston, R.I.).

"Integrated firefighting fluid supply mechanism and methods thereof" was invented by James M. Morgan (Port Arthur, Texas) and James C. Rucker (Port Arthur, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An additive supply system for a fire fighting mechanism comprises an additive supply line connecting an additive source to a fire fighting fluid line, the additive supply line being in fluid communication with an additive pump and a recirculating line; a balanced pressure valve capable of throttling the recirculating line; and a control means for controlling the add...