Granted Patent
Utility
US 5,623,923 · App. 08/471,221
Respiratory equipment with comfort adjustment
Inventors:
Fernand Bertheau, Philippe Thomas
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Jun 6, 1995
Inventors
Fernand Bertheau
Philippe Thomas
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.