Granted Patent
Utility
US 4,069,591 · App. 05/666,796
Elastomeric inclinometer
Inventor:
Billy W. McArthur
Patented Case
View Patent ↗
Granted: Jan 24, 1978
Filed: Mar 15, 1976
Inventor
Billy W. McArthur
Assignee (at issue)
Sperry-Sun, 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.