Granted Patent
Utility
US 4,808,568 · App. 07/046,187
Thermal transfer printing
Inventors:
Peter Gregory, Roy Bradbury
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: May 5, 1987
Inventors
Peter Gregory
Roy Bradbury
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.