Granted Patent
Utility
US 6,019,893 · App. 09/107,427
Water purifier for a spa
Inventors:
Raymond P. Denkewicz, Jr., John D. Rafter, Mark A. Bollinger
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Jun 30, 1998
Inventors
Raymond P. Denkewicz, Jr.
John D. Rafter
Mark A. Bollinger
Assignee (at issue)
Fountainhead Technologies, 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.