Granted Patent
Utility
US 4,531,140 · App. 06/642,816
Heat-sensitive recording material
Inventors:
Toshitake Suzuki, Naoto Arai, Shoji Aoyagi, Toranosuke Saito, Masakatu Kitani, Takashi Ishibashi
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Aug 21, 1984
Inventors
Toshitake Suzuki
Naoto Arai
Shoji Aoyagi
Toranosuke Saito
Masakatu Kitani
Takashi Ishibashi
Assignees (at issue)
Kansaki Paper Manufacturing Co., Ltd.
Sanko Kaihatsu Kagaku Kenkyusho
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.