Granted Patent
Utility
US 5,017,964 · App. 07/442,880
Corona charge system and apparatus for electrophotographic printing press
Inventor:
Paul V. Sadwick
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Nov 29, 1989
Inventor
Paul V. Sadwick
Assignee (at issue)
AM International, 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.