Granted Patent
Utility
US 4,942,668 · App. 07/192,809
Digital inclinometer
Inventor:
Robert C. Franklin
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: May 11, 1988
Inventor
Robert C. Franklin
Assignee (at issue)
Zircon International, 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.