Granted Patent
Utility
US 4,643,948 · App. 06/714,770
Coatings for ink jet nozzles
Inventors:
Arthur F. Diaz, Richard Hernandez
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Mar 22, 1985
Inventors
Arthur F. Diaz
Richard Hernandez
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.