Granted Patent
Utility
US 5,006,869 · App. 07/433,110
Charged particle printer
Inventors:
W. Raymond Buchan, Robert McCallum
Patented Case
View Patent ↗
Granted: Apr 9, 1991
Filed: Nov 8, 1989
Inventors
W. Raymond Buchan
Robert McCallum
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.