Granted Patent
Utility
US 5,900,212 · App. 08/790,750
Hand-held ultraviolet water purification system
Inventors:
Miles Maiden, Robert Watkins
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Jan 27, 1997
Inventors
Miles Maiden
Robert Watkins
Assignee (at issue)
Hydro-Photon, Inc.
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.