IP Library › Granted Patent US 6,722,211
Granted Patent Utility
US 6,722,211 · App. 10/619,873

Multi-stage variable orifice flow obstruction sensor

Inventors: Calin Ciobanu, Adrian de Silva
Patented Case View Patent ↗
Granted: Apr 20, 2004 Filed: Jul 15, 2003
Inventors
Calin Ciobanu
Adrian de Silva
Assignee (at issue)
VIASYS Healthcare, Critical Care Division

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,722,211
App. No.
10/619,873
Filed
2003-07-15
Granted
2004-04-20
Kind
B1