Granted Patent
Utility
US 4,749,644 · App. 06/875,611
Photographic material with two size population of silver halide grains and development inhibiting agent in an emulsion layer
Inventors:
Yasuo Tosaka, Keiji Ogi, Atsushi Kamitakahara
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Jun 18, 1986
Inventors
Yasuo Tosaka
Keiji Ogi
Atsushi Kamitakahara
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.