Granted Patent
Utility
US 4,596,144 · App. 06/713,751
Acoustic ranging system
Inventors:
Stanley Panton, Steven J. Woodward
Patented Case
View Patent ↗
Granted: Jun 24, 1986
Filed: Mar 19, 1985
Inventors
Stanley Panton
Steven J. Woodward
Assignee (at issue)
Canadian Corporate Management Company Limited
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.