Granted Patent
Utility
US 6,544,086 · App. 09/794,219
Four stroke engine with cooling system
Inventors:
Rudolf Tscherne, Alois Wolfsgruber
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Feb 28, 2001
Inventors
Rudolf Tscherne
Alois Wolfsgruber
Assignee (at issue)
Bombardier-Rotax GmbH
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.