Granted Patent
Utility
US 6,833,205 · App. 09/909,845
Electrochemical cell system output control method and apparatus
Inventors:
A. John Speranza, Lawrence Moulthrop
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Jul 20, 2001
Inventors
A. John Speranza
Lawrence Moulthrop
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.