Granted Patent
Utility
US 4,909,175 · App. 07/254,540
Boat with trimmable bottom
Inventor:
Howard M. Arnseson
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Oct 5, 1988
Inventor
Howard M. Arnseson
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.