Granted Patent
Utility
US 4,350,449 · App. 06/162,295
Resistive ribbon printing apparatus and method
Inventors:
Gerald P. Countryman, Ronald G. Findlay
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Jun 23, 1980
Inventors
Gerald P. Countryman
Ronald G. Findlay
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.