Granted Patent
Utility
US 4,890,123 · App. 07/226,489
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Inventors:
Robert McCallum, Dale E. Hendrikx
Patented Case
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Granted: Dec 26, 1989
Filed: Aug 1, 1988
Inventors
Robert McCallum
Dale E. Hendrikx
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.