Granted Patent
Utility
US 6,722,631 · App. 10/091,227
Valve device
Inventor:
Patrick Bailey
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Mar 4, 2002
Inventor
Patrick Bailey
Assignee (at issue)
Aventis CropScience S.A.
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.