Granted Patent
Utility
US 6,830,688 · App. 10/294,456
Integrated hydroponic and wetland wastewater treatment systems and associated methods
Inventors:
David C. H. Austin, David J. Maciolek, J. Rob von Rohr
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Nov 14, 2002
Inventors
David C. H. Austin
David J. Maciolek
J. Rob von Rohr
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.