Granted Patent
Utility
US 5,381,653 · App. 08/162,871
Aircraft engine with pressure exchanger
Inventor:
Rolf Althaus
Patented Case
View Patent ↗
Granted: Jan 17, 1995
Filed: Dec 8, 1993
Inventor
Rolf Althaus
Assignee (at issue)
Asea Brown Boveri, S.A.
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.