Granted Patent
Utility
US 4,690,744 · App. 06/630,514
Method of ion beam generation and an apparatus based on such method
Inventors:
Masahiko Naoe, Shozo Ishibashi
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Jul 13, 1984
Inventors
Masahiko Naoe
Shozo Ishibashi
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.