Granted Patent
Utility
US 5,314,757 · App. 07/709,816
Information recording media
Inventors:
Kiyotaka Shindo, Koichi Igarashi, Kunihiko Mizumoto, Hidehiko Hashimoto
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Jun 4, 1991
Inventors
Kiyotaka Shindo
Koichi Igarashi
Kunihiko Mizumoto
Hidehiko Hashimoto
Assignee (at issue)
Mitsui Petrochemical 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.