ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,907, issued on Oct. 21, was assigned to Tenneco Automotive Operating Co. LLC (Northville, Mich.).
"Dual mode muffler" was invented by Gabriel Ostromecki (Ann Arbor, Mich.), Nicholas Reding (Mason, Mich.) and Isidro L. Hernandez (Ypsilanti, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A muffler assembly for a vehicle exhaust system including a muffler that has a primary muffler conduit with a primary resonator, a secondary muffler conduit with a secondary resonator, and a valve that directs exhaust flow through both the primary and secondary muffler conduits or primarily through the secondary muffler conduit depending on the position of the v...