Granted Patent
Utility
US 6,740,235 · App. 10/090,247
Swivelling filter head assembly
Inventor:
Thomas Gill
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: Mar 4, 2002
Inventor
Thomas Gill
Assignee (at issue)
CULLIGAN INTERNATIONAL COMPANY
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.