Granted Patent
Utility
US 4,879,569 · App. 07/284,267
Multiple source charged particle generation
Inventor:
Igor Kubelik
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Dec 14, 1988
Inventor
Igor Kubelik
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.