Granted Patent
Utility
US 4,150,993 · App. 05/853,103
Process for forming a direct positive image
Inventors:
Tsuneo Suga, Keiji Ogi, Kenji Egami
Patented Case
View Patent ↗
Granted: Apr 24, 1979
Filed: Nov 21, 1977
Inventors
Tsuneo Suga
Keiji Ogi
Kenji Egami
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.