Granted Patent
Utility
US 6,363,667 · App. 09/740,797
Passive collimating tubular skylight
Inventor:
Mark J. O'Neill
Patented Case
View Patent ↗
Granted: Apr 2, 2002
Filed: Dec 21, 2000
Inventor
Mark J. O'Neill
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.