Granted Patent
Utility
US 4,264,224 · App. 06/021,405
Off-the-carrier ribbon feed and drive on a high speed movable-carrier impact printer
Inventor:
Raymond D. Mathews
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Mar 19, 1979
Inventor
Raymond D. Mathews
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.