Granted Patent
Utility
US 4,537,824 · App. 06/588,084
Magnetic recording medium
Inventors:
Masao Asano, Wataru Fujimatsu, Kazumasa Matsumoto, Hideki Murata, Toshihiko Sato, Kenji Watanabe
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Mar 9, 1984
Inventors
Masao Asano
Wataru Fujimatsu
Kazumasa Matsumoto
Hideki Murata
Toshihiko Sato
Kenji Watanabe
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.