Granted Patent
Utility
US 4,801,874 · App. 07/020,077
Method and apparatus for measuring electricity
Inventor:
Horst R. Loeffler
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Feb 27, 1987
Inventor
Horst R. Loeffler
Assignee (at issue)
Process Systems, Inc.
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.