Granted Patent
Utility
US 6,824,520 · App. 10/251,286
Method and apparatus for tracking usage of a respiratory measurement device
Inventors:
Joseph Orr, Scott A. Kofoed
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Sep 20, 2002
Inventors
Joseph Orr
Scott A. Kofoed
Assignee (at issue)
Pulmonary Data Services, 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.