Granted Patent
Utility
US 4,928,703 · App. 07/275,762
Non-contact respiration rate and apnea monitor using pulmonary gas exchange technique
Inventor:
Jacob Y. Wong
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Nov 23, 1988
Inventor
Jacob Y. Wong
Assignee (at issue)
Evionics, 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.