Granted Patent
Utility
US 6,773,238 · App. 10/030,668
Pumping device for discharging large amounts of liquid
Inventor:
Jan Sprakel
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: May 15, 2002
Inventor
Jan Sprakel
Assignee (at issue)
KAMAT-Pumpen GmbH & Co. KG
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.