Granted Patent
Utility
US 4,239,372 · App. 05/953,348
Transfer type electrophotographic copying machine
Inventor:
Fumio Iwai
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Oct 23, 1978
Inventor
Fumio Iwai
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.