Granted Patent
Utility
US 5,052,895 · App. 07/557,744
Pressure wave machine
Inventor:
Rolf Althaus
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Jul 26, 1990
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.