Granted Patent
Utility
US 4,417,474 · App. 06/218,662
Densitometer
Inventor:
Peter P. Elderton
Patented Case
View Patent ↗
Granted: Nov 29, 1983
Filed: Dec 22, 1980
Inventor
Peter P. Elderton
Assignee (at issue)
ITT Corporation
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.