Granted Patent
Utility
US 4,511,909 · App. 06/437,857
Heat-sensitive recording materials
Inventor:
Naoto Arai
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Oct 29, 1982
Inventor
Naoto Arai
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.