Granted Patent
Utility
US 4,743,581 · App. 06/909,849
Thermal transfer printing
Inventor:
Peter Gregory
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Sep 22, 1986
Inventor
Peter Gregory
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.