Granted Patent
Utility
US 4,458,253 · App. 06/454,918
Thermal print apparatus using a thermal transfer ribbon such as a multi-colored one, and a printing method
Inventors:
Willie Goff, Jr., Ta C. Ku
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Dec 30, 1982
Inventors
Willie Goff, Jr.
Ta C. Ku
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.