Granted Patent
Utility
US 6,692,234 · App. 10/099,810
Pump system with vacuum source
Inventor:
David Muhs
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Mar 15, 2002
Inventor
David Muhs
Assignee (at issue)
Water Management Systems, 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.