Granted Patent
Utility
US 4,977,133 · App. 07/302,637
Heat sensitive recording material
Inventors:
Kouichi Ishida, Mikio Nakamura, Yukio Takayama
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Jan 27, 1989
Inventors
Kouichi Ishida
Mikio Nakamura
Yukio Takayama
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.