Granted Patent
Utility
US 4,687,450 · App. 06/910,325
Marine propulsion device exhaust system
Inventors:
Gerald F. Bland, Stephen R. Johnson
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Sep 22, 1986
Inventors
Gerald F. Bland
Stephen R. Johnson
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.