Granted Patent
Utility
US 6,524,464 · App. 09/842,617
Fan flow sensor for hydrogen generating proton exchange member electrolysis cell
Inventor:
Richard Dubey
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Apr 25, 2001
Inventor
Richard Dubey
Assignee (at issue)
PROTON ENERGY SYSTEMS, 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.