Granted Patent
Utility
US 5,364,290 · App. 08/033,945
Electric utility revenue meter polycarbonate base
Inventor:
Marinus Hartman
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Mar 18, 1993
Inventor
Marinus Hartman
Assignee (at issue)
Schlumberger Canada 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.