Granted Patent
Utility
US 4,737,443 · App. 06/865,000
Optical recording medium
Inventors:
Toshio Niwa, Yukichi Murata, Tetsuo Ozawa, Shuichi Maeda, Yutaka Kurose
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: May 5, 1986
Inventors
Toshio Niwa
Yukichi Murata
Tetsuo Ozawa
Shuichi Maeda
Yutaka Kurose
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.