Granted Patent
Utility
US 4,439,775 · App. 06/353,125
Multiple speed printer
Inventor:
Jerome L. Johnson
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: Mar 1, 1982
Inventor
Jerome L. Johnson
Assignee (at issue)
Centronics Data Computer 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.