Granted Patent
Utility
US 5,079,751 · App. 07/658,702
Acoustic ranging systems
Inventor:
Steven J. Woodward
Patented Case
View Patent ↗
Granted: Jan 7, 1992
Filed: Feb 20, 1991
Inventor
Steven J. Woodward
Assignee (at issue)
Federal Industries Industrial Group 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.