Granted Patent
Utility
US 6,702,662 · App. 10/296,515
Method for providing clean air in premises and device for carrying through said method
Inventor:
Jan Kristensson
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Nov 25, 2002
Inventor
Jan Kristensson
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.