Granted Patent
Utility
US 4,568,209 · App. 06/542,525
Multicolor dot matrix printing system
Inventor:
Samuel D. Zerillo
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Oct 17, 1983
Inventor
Samuel D. Zerillo
Assignee (at issue)
Centronics Data Computer Corporation
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.