Granted Patent
Utility
US 6,478,487 · App. 09/887,415
Line printer variable print ribbon system
Inventors:
Jeng-Dung Jou, Y. Grant Chang
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Jun 22, 2001
Inventors
Jeng-Dung Jou
Y. Grant Chang
Assignee (at issue)
PRINTRONIX, LLC
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.