Granted Patent
Utility
US 5,267,219 · App. 07/914,532
Acoustic range-finding system
Inventor:
Steven J. Woodward
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jul 17, 1992
Inventor
Steven J. Woodward
Assignee (at issue)
Milltronics Ltd.
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.