Granted Patent
Utility
US 6,320,989 · App. 09/235,695
Stepped acoustic impedance-matching transformer for very narrow channel acoustic traveling wave lens waveguide
Inventors:
Robert M. Montgomery, Reeder N. Ward, Mark T. Montgomery, Pat O. Bentley
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Jan 22, 1999
Inventors
Robert M. Montgomery
Reeder N. Ward
Mark T. Montgomery
Pat O. Bentley
Assignee (at issue)
HARRIS CORPORATION
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.