Granted Patent
Utility
US 5,015,152 · App. 07/438,802
Battery monitoring and charging circuit for sump pumps
Inventor:
James L. Greene
Patented Case
View Patent ↗
Granted: May 14, 1991
Filed: Nov 20, 1989
Inventor
James L. Greene
Assignee (at issue)
The Marley Company LLC
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.