Granted Patent
Utility
US 4,329,072 · App. 06/089,662
Ribbon feed and lift mechanism for a typewriter
Inventor:
Donald J. Kacmarcik
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Oct 30, 1979
Inventor
Donald J. Kacmarcik
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.