Granted Patent
Utility
US 4,954,477 · App. 07/342,049
Heat-sensitive recording materials
Inventors:
Shigekazu Shuku, Shunichiro Mukoyoshi, Eiji Yuasa, Tsunefumi Yamori
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Apr 24, 1989
Inventors
Shigekazu Shuku
Shunichiro Mukoyoshi
Eiji Yuasa
Tsunefumi Yamori
Assignee (at issue)
Kanzaki Paper Manufacturing Co., Ltd.
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.