Granted Patent
Utility
US 4,464,279 · App. 06/435,103
Magnetic recording medium
Inventor:
Mitutaka Arai
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Oct 18, 1982
Inventor
Mitutaka Arai
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.