Granted Patent
Utility
US 6,608,722 · App. 09/920,060
Directional diffuser
Inventors:
James Cowan, Kenneth A. Haines
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Aug 1, 2001
Inventors
James Cowan
Kenneth A. Haines
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.