Granted Patent
Utility
US 4,981,765 · App. 07/229,391
Thermal transfer printer for producing a photomask
Inventor:
Jin Mizuguchi
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Aug 8, 1988
Inventor
Jin Mizuguchi
Assignee (at issue)
Ciba-Geigy
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.