Granted Patent
Utility
US 5,646,583 · App. 08/582,686
Acoustic isolator having a high impedance layer of hafnium oxide
Inventors:
Charles W. Seabury, Paul H. Kobrin, Jeffrey F. DeNatale
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Jan 4, 1996
Inventors
Charles W. Seabury
Paul H. Kobrin
Jeffrey F. DeNatale
Assignee (at issue)
Rockwell International 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.