Granted Patent
Utility
US 5,069,600 · App. 07/619,425
Pressure wave machine
Inventors:
Rolf Althaus, Erwin Zauner
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Nov 29, 1990
Inventors
Rolf Althaus
Erwin Zauner
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.