Granted Patent
Utility
US 4,968,657 · App. 07/342,018
Thermal transfer printing
Inventors:
Peter Gregory, Roy Bradbury
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Apr 24, 1989
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.