Granted Patent
Utility
US 5,199,258 · App. 07/838,015
Adjustable torque/horsepower exhaust control system
Inventor:
Randolph S. Barth
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Feb 20, 1992
Inventor
Randolph S. Barth
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.