Granted Patent
Utility
US 6,774,746 · App. 10/031,240
Thin film bulk acoustic resonator filters with a piezoelectric layer of lead scandium tantalum oxide
Inventors:
Roger W. Whatmore, Paul B. Kirby, Qingxin Su, Eiju Komuro
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Apr 2, 2002
Inventors
Roger W. Whatmore
Paul B. Kirby
Qingxin Su
Eiju Komuro
Assignee (at issue)
TDK 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.