Granted Patent
Utility
US 5,998,057 · App. 09/077,408
Gas diffusion electrode for polymer electrolyte membrane fuel cells
Inventors:
Arthur Koschany, Christian Lucas, Thomas Schwesinger
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Oct 5, 1998
Inventors
Arthur Koschany
Christian Lucas
Thomas Schwesinger
Assignee (at issue)
Magnet-Motor Gesellschaft fuer magnetmotorische Technik mbH
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.