Granted Patent
Utility
US 6,575,195 · App. 10/218,387
Bypass valve
Inventor:
Mark E. Wichmann
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Aug 14, 2002
Inventor
Mark E. Wichmann
Assignee (at issue)
United States Filter Corporation
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.