Granted Patent
Utility
US 6,427,689 · App. 08/057,622
Sleep apnea treatment apparatus
Inventors:
Mark C. Estes, Janice M. Cattano
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: May 4, 1993
Inventors
Mark C. Estes
Janice M. Cattano
Assignee (at issue)
Respironics, 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.