Granted Patent
Utility
US 5,509,832 · App. 08/443,728
Marine jet drive
Inventor:
Paul W. Roos
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: May 18, 1995
Inventor
Paul W. Roos
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.