Granted Patent
Utility
US 4,839,671 · App. 07/253,138
Selectable density charge deposition printing system
Inventors:
Sotos M. Theodoulou, Christopher Thomson, Eric Vannerson, Wm. Keith Baker, Alvin Sun, Ken Hurley
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Oct 4, 1988
Inventors
Sotos M. Theodoulou
Christopher Thomson
Eric Vannerson
Wm. Keith Baker
Alvin Sun
Ken Hurley
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.