Granted Patent
Utility
US 4,197,568 · App. 05/915,969
Corona generating apparatus
Inventors:
Shigeru Inowa, Katsuhiro Syukuri
Patented Case
View Patent ↗
Granted: Apr 8, 1980
Filed: Jun 15, 1978
Inventors
Shigeru Inowa
Katsuhiro Syukuri
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.