Granted Patent
Utility
US 6,778,926 · App. 10/036,161
Calibration methods and apparatus for plethysmographic measurement chambers
Inventor:
Philip T. Dempster
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Dec 31, 2001
Inventor
Philip T. Dempster
Assignee (at issue)
Life Measurement, 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.