Granted Patent
Utility
US 4,247,784 · App. 05/970,401
Measurement of material level in vessels
Inventor:
James W. Henry
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Dec 18, 1978
Inventor
James W. Henry
Assignee (at issue)
EASTMAN KODAK COMPANY
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.