Granted Patent
Utility
US 5,638,036 · App. 08/526,340
Acoustic wave ladder filter with unequal series and shunt transducer periodicities and method of making
Inventors:
David Penunuri, Thomas S. Hickernell
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Sep 11, 1995
Inventors
David Penunuri
Thomas S. Hickernell
Assignee (at issue)
Motorola, Inc.
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.