Granted Patent
Utility
US 5,047,996 · App. 07/440,139
Sonar transducer
Inventors:
Ronald E. Armiger, Joyce M. Mang
Patented Case
View Patent ↗
Granted: Sep 10, 1991
Filed: Nov 22, 1989
Inventors
Ronald E. Armiger
Joyce M. Mang
Assignee (at issue)
Westinghouse Electric Company LLC
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.