Granted Patent
Utility
US 5,593,291 · App. 08/506,491
Fluid pumping apparatus
Inventor:
William Harry Lynn
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Jul 25, 1995
Inventor
William Harry Lynn
Assignee (at issue)
THOMAS INDUSTRIES, 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.