Granted Patent
Utility
US 6,289,690 · App. 09/472,320
Method and apparatus for disinfecting a water cooler reservoir
Inventor:
Kenneth A. Davis
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Dec 23, 1999
Inventor
Kenneth A. Davis
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.