Granted Patent
Utility
US 6,694,766 · App. 10/225,451
Power generation systems with earth heat transfer
Inventors:
Howard E. Johnson, Jr., Gregory Tinkler
Patented Case
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Granted: Feb 24, 2004
Filed: Aug 21, 2002
Inventors
Howard E. Johnson, Jr.
Gregory Tinkler
Assignee (at issue)
Enlink Geoenergy Services, 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.