Granted Patent
Utility
US 4,562,143 · App. 06/633,063
Method of forming image by means of heat development
Inventors:
Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa
Patented Case
View Patent ↗
Granted: Dec 31, 1985
Filed: Jul 20, 1984
Inventors
Shigeto Hirabayashi
Toyoaki Masukawa
Wataru Ishikawa
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.