Granted Patent
Utility
US 4,331,033 · App. 06/152,689
Precision flowmeter
Inventor:
Reginald S. Emerson
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: May 23, 1980
Inventor
Reginald S. Emerson
Assignee (at issue)
Leslie Hartridge Limited
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.