Granted Patent
Utility
US 6,509,920 · App. 10/116,073
Ink ribbon positioning system of a color printer
Inventors:
Li-Fu Sung, Yung-Yi Li
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Apr 5, 2002
Inventors
Li-Fu Sung
Yung-Yi Li
Assignee (at issue)
BenQ 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.