Granted Patent
Utility
US 4,240,810 · App. 06/039,743
Collecting electrode plate assembly
Inventor:
Alfred Frauenfelder
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: May 16, 1979
Inventor
Alfred Frauenfelder
Assignee (at issue)
ELEX-AAF AG
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.