Granted Patent
Utility
US 6,315,524 · App. 09/531,631
Pump system with vacuum source
Inventors:
David Muhs, Gianfranco Parma
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Mar 21, 2000
Inventors
David Muhs
Gianfranco Parma
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.