Granted Patent
Utility
US 5,117,832 · App. 07/750,691
Curved rectangular/elliptical transducer
Inventors:
Narendra T. Sanghvi, John N. Zink
Patented Case
View Patent ↗
Granted: Jun 2, 1992
Filed: Aug 20, 1991
Inventors
Narendra T. Sanghvi
John N. Zink
Assignee (at issue)
Diasonics, 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.