Granted Patent
Utility
US 6,790,653 · App. 10/290,900
Biological filter apparatus with multiple filter units
Inventor:
James Cooke
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Nov 8, 2002
Inventor
James Cooke
Assignee (at issue)
Bio-Reaction Industries, LLC
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.