Granted Patent
Utility
US 6,690,909 · App. 10/216,217
Double-sided printing device for paper handling
Inventor:
Yu-Jen Su
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Aug 12, 2002
Inventor
Yu-Jen Su
Assignee (at issue)
Silitek 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.