Granted Patent
Utility
US 4,303,927 · App. 05/780,572
Apparatus for exciting an array of ink jet nozzles and method of forming
Inventor:
Sherman H. Tsao
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Mar 23, 1977
Inventor
Sherman H. Tsao
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.