Granted Patent
Utility
US 4,299,236 · App. 06/087,288
Incentive breathing exerciser
Inventor:
Victor Poirier
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Oct 22, 1979
Inventor
Victor Poirier
Assignee (at issue)
Thermo Electron GmbH
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.