Granted Patent
Utility
US 4,299,908 · App. 06/138,934
Method for forming a negative image
Inventors:
Noboru Ito, Eiichi Sakamoto, Mikio Kawasaki, Takashi Uchida
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Apr 10, 1980
Inventors
Noboru Ito
Eiichi Sakamoto
Mikio Kawasaki
Takashi Uchida
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.