Granted Patent
Utility
US 5,398,553 · App. 07/838,446
Electromagnetic flowmeter
Inventor:
John Hemp
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Mar 31, 1992
Inventor
John Hemp
Assignee (at issue)
Fox Boro 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.