Granted Patent
Utility
US 4,528,574 · App. 06/479,785
Apparatus for reducing erosion due to cavitation in ink jet printers
Inventor:
James H. Boyden
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Mar 28, 1983
Inventor
James H. Boyden
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.