ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,891, issued on March 25, was assigned to Arctic Cat Inc. (Thief River Falls, Minn.).
"Muffler assemblies for snowmobiles" was invented by Jeffrey T. Tweet (Thief River Falls, Minn.) and David L. Vigen (Thief River Falls, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An exhaust system for a snowmobile includes a muffler housing, the bottom end of the muffler housing including a muffler exhaust outlet configured to emit exhaust. The exhaust system includes a muffler housing cover spaced from the muffler housing to define an airflow channel therebetween, the muffler housing cover forming a bottom opening. The exhaust system also includes a gas ...