Granted Patent
Utility
US 6,569,321 · App. 09/893,472
Method and apparatus for treating stormwater runoff
Inventor:
Larry S. Coffman
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Jun 29, 2001
Inventor
Larry S. Coffman
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.