Granted Patent
Utility
US 4,699,533 · App. 06/806,892
Surface layer to reduce contact resistance in resistive printing ribbon
Inventors:
Jesse R. Crowe, Derek B. Dove, Kwang K. Shih
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Dec 9, 1985
Inventors
Jesse R. Crowe
Derek B. Dove
Kwang K. Shih
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.