Granted Patent
Utility
US 5,273,664 · App. 07/996,823
Apparatus and method for disinfection of water by ozone injection
Inventor:
Christopher Schulz
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Dec 28, 1992
Inventor
Christopher Schulz
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.