Granted Patent
Utility
US 6,644,767 · App. 10/302,606
Ejection of ink using pulsating pressure and a movable shutter
Inventor:
Kia Silverbrook
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Nov 23, 2002
Inventor
Kia Silverbrook
Assignee (at issue)
Silverbrook Research Pty Ltd
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.