Granted Patent
Utility
US 4,743,502 · App. 06/883,817
Magneto-optical medium
Inventors:
Toshihiko Yoshitomi, Yoshimitsu Kobayashi, Jun Sasaki, Yukio Watanabe
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Jul 9, 1986
Inventors
Toshihiko Yoshitomi
Yoshimitsu Kobayashi
Jun Sasaki
Yukio Watanabe
Assignee (at issue)
Mitsubishi Chemical Industries, 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.