Granted Patent
Utility
US 4,886,381 · App. 07/185,390
Dot matrix print head assembly
Inventor:
Kevin T. Kersey
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: May 6, 1988
Inventor
Kevin T. Kersey
Assignee (at issue)
DH TECHNOLOGY, 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.