Granted Patent
Utility
US 4,975,616 · App. 07/233,627
Piezoelectric transducer array
Inventor:
Kyung-Tae Park
Patented Case
View Patent ↗
Granted: Dec 4, 1990
Filed: Aug 18, 1988
Inventor
Kyung-Tae Park
Assignee (at issue)
Atochem North America, 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.