Granted Patent
Utility
US 4,502,091 · App. 06/581,732
Positive and negative ion distributor bar
Inventor:
Donald G. Saurenman
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Feb 21, 1984
Inventor
Donald G. Saurenman
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.