Granted Patent
Utility
US 6,375,528 · App. 09/547,591
Adjustable variable vent opening plugs for engine exhaust
Inventor:
Gerald F. Neisen
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Apr 11, 2000
Inventor
Gerald F. Neisen
Assignee (at issue)
Bombardier Motor Corporation of America
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.