Granted Patent
Utility
US 4,476,387 · App. 06/483,805
Corona charging apparatus
Inventors:
Harold W. Cobb, Richard A. Fotland
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Apr 11, 1983
Inventors
Harold W. Cobb
Richard A. Fotland
Assignee (at issue)
Delphax Systems
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.