Granted Patent
Utility
US 6,479,276 · App. 09/938,478
Biological filter apparatus
Inventors:
Randall R. Thom, Paul C. John, Charles S. Swift, James T. Boswell, William C. Stewart
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Aug 23, 2001
Inventors
Randall R. Thom
Paul C. John
Charles S. Swift
James T. Boswell
William C. Stewart
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.