Granted Patent
Utility
US 4,279,521 · App. 06/090,942
Wire matrix print head
Inventor:
Drew A. Kightlinger
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Nov 2, 1979
Inventor
Drew A. Kightlinger
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.