Granted Patent
Utility
US 6,352,106 · App. 09/564,348
High-efficiency pumping and distribution system incorporating a self-balancing, modulating control valve
Inventor:
Thomas B. Hartman
Patented Case
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Granted: Mar 5, 2002
Filed: May 4, 2000
Inventor
Thomas B. Hartman
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.