Granted Patent
Utility
US 4,259,427 · App. 06/025,783
Image-forming developer
Inventors:
Yuzo Ohmuro, Nin-ichi Kamogawa, Shigeru Uetake, Yoshio Yamazaki
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Apr 2, 1979
Inventors
Yuzo Ohmuro
Nin-ichi Kamogawa
Shigeru Uetake
Yoshio Yamazaki
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.