Granted Patent
Utility
US 4,546,641 · App. 06/542,836
Densitometer
Inventor:
Van H. Nguyen
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Oct 17, 1983
Inventor
Van H. Nguyen
Assignee (at issue)
International Telephone and Telegraph 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.