Granted Patent
Utility
US 4,623,557 · App. 06/723,342
Process for the production of heat-sensitive recording materials
Inventors:
Tsunefumi Yamori, Shuki Okauchi, Hironari Fujioka
Patented Case
View Patent ↗
Granted: Nov 18, 1986
Filed: Apr 15, 1985
Inventors
Tsunefumi Yamori
Shuki Okauchi
Hironari Fujioka
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.