Granted Patent
Utility
US 5,438,230 · App. 08/350,248
Piezoelectric material detector
Inventor:
Dale G. Hall
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Dec 6, 1994
Inventor
Dale G. Hall
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.