Granted Patent
Utility
US 4,981,748 · App. 07/310,587
Heat transfer recording sheet
Inventors:
Yutaka Kawai, Yukio Tsuge, Yukichi Murata, Masahiro Yamamoto
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Feb 15, 1989
Inventors
Yutaka Kawai
Yukio Tsuge
Yukichi Murata
Masahiro Yamamoto
Assignee (at issue)
Mitsubishi Kasei 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.