Granted Patent
Utility
US 4,333,083 · App. 06/219,478
Electrostatic drop sensor with sensor diagnostics for ink jet printers
Inventor:
Stephen Aldridge
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Dec 23, 1980
Inventor
Stephen Aldridge
Assignee (at issue)
International Business Machines 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.