Granted Patent
Utility
US 6,244,574 · App. 09/622,384
Dual diffuser assembly
Inventor:
Ernest W. Downs
Patented Case
View Patent ↗
Granted: Jun 12, 2001
Filed: Aug 16, 2000
Inventor
Ernest W. Downs
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.