Granted Patent
Utility
US 4,761,338 · App. 07/096,305
Magnetic recording medium
Inventors:
Masao Asano, Kazumasa Matsumoto, Toshio Tsuji, Yoshitaka Yasufuku
Patented Case
View Patent ↗
Granted: Aug 2, 1988
Filed: Sep 9, 1987
Inventors
Masao Asano
Kazumasa Matsumoto
Toshio Tsuji
Yoshitaka Yasufuku
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.