Granted Patent
Utility
US 4,543,309 · App. 06/610,864
Heat-developable image-pattern recording material
Inventors:
Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa, Tetsuya Harada
Patented Case
View Patent ↗
Granted: Sep 24, 1985
Filed: May 16, 1984
Inventors
Shigeto Hirabayashi
Toyoaki Masukawa
Wataru Ishikawa
Tetsuya Harada
Assignee (at issue)
Konishiroku Photo Industry 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.