Granted Patent
Utility
US 6,695,891 · App. 09/928,666
Keyed system for connection of filter cartridge to filter holder
Inventor:
Roger P. Reid
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Aug 11, 2001
Inventor
Roger P. Reid
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.