Granted Patent
Utility
US 6,811,700 · App. 10/294,450
Integrated hydroponic and fixed-film wastewater treatment systems and associated methods
Inventors:
David C. H. Austin, David J. Maciolek, Eric Lohan
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Nov 14, 2002
Inventors
David C. H. Austin
David J. Maciolek
Eric Lohan
Assignee (at issue)
Dharma Living Systems, 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.