Granted Patent
Utility
US 5,503,147 · App. 08/257,271
Respiratory equipment with comfort adjustment
Inventor:
Fernand Bertheau
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Jun 9, 1994
Inventor
Fernand Bertheau
Assignee (at issue)
Intertechnique
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.