Granted Patent
Utility
US 5,757,396 · App. 08/269,446
Ink jet printhead having an ultrasonic maintenance system incorporated therein and an associated method of maintaining an ink jet printhead by purging foreign matter therefrom
Inventor:
Dan M. Bruner
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Jun 30, 1994
Inventor
Dan M. Bruner
Assignee (at issue)
Compaq 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.