Granted Patent
Utility
US 6,209,622 · App. 08/329,124
Ventilation system
Inventors:
Frederic Lagace, Jean-Francois Grondin, Pierre Cusson, Michel Julien, Daniel Marcoux
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Oct 25, 1994
Inventors
Frederic Lagace
Jean-Francois Grondin
Pierre Cusson
Michel Julien
Daniel Marcoux
Assignee (at issue)
Venmar Ventilation 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.