Granted Patent
Utility
US 4,824,332 · App. 07/164,833
Reversible pump assembly
Inventors:
Jimmie G. Perkins, James W. Grim
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Mar 7, 1988
Inventors
Jimmie G. Perkins
James W. Grim
Assignee (at issue)
McCord Winn Textron
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.