Granted Patent
Utility
US 6,561,225 · App. 10/038,535
Passive flow control valve
Inventor:
Spiros G. Raftis
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Jan 2, 2002
Inventor
Spiros G. Raftis
Assignee (at issue)
Red Valve Company, Inc.
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.