Granted Patent
Utility
US 4,434,356 · App. 06/452,346
Regulated current source for thermal printhead
Inventors:
Timothy P. Craig, John W. Pettit, Michael Timperman
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Dec 22, 1982
Inventors
Timothy P. Craig
John W. Pettit
Michael Timperman
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.