Granted Patent
Utility
US 4,278,983 · App. 06/041,842
Ink jet writing device
Inventor:
Laszlo Halasz
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: May 23, 1979
Inventor
Laszlo Halasz
Assignee (at issue)
Gould Inc.
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.