Granted Patent
Utility
US 6,473,940 · App. 09/896,688
Knob for a post valve
Inventor:
Devin G. Cooper
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Jun 29, 2001
Inventor
Devin G. Cooper
Assignee (at issue)
HARSCO TECHNOLOGIES LLC
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.