Granted Patent
Utility
US 6,019,892 · App. 09/122,574
Guide tracking for cog rake bar screens
Inventor:
Stephen B. Wilcher
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Jul 24, 1998
Inventor
Stephen B. Wilcher
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.