Granted Patent
Utility
US 4,770,989 · App. 07/047,538
Heat-developable color photosensitive element
Inventors:
Tawara Komamura, Masaru Iwagaki, Takashi Sasaki, Fumio Ishii, Kunihiro Koshizuka
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: May 4, 1987
Inventors
Tawara Komamura
Masaru Iwagaki
Takashi Sasaki
Fumio Ishii
Kunihiro Koshizuka
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.