Granted Patent
Utility
US 4,413,331 · App. 05/680,254
Broad beam transducer
Inventors:
Linwood M. Rowe, Jr., Dale D. Skinner, John H. Thompson
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Apr 26, 1976
Inventors
Linwood M. Rowe, Jr.
Dale D. Skinner
John H. Thompson
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.