Granted Patent
Utility
US 6,637,722 · App. 10/349,443
Pilot operated microvalve device
Inventor:
Harry A. Hunnicutt
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Jan 22, 2003
Inventor
Harry A. Hunnicutt
Assignee (at issue)
KELSEY-HAYES-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.