Granted Patent
Utility
US 4,756,987 · App. 06/934,694
Optical recording medium
Inventors:
Shuichi Maeda, Yutaka Kurose, Tetsuo Ozawa
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Nov 25, 1986
Inventors
Shuichi Maeda
Yutaka Kurose
Tetsuo Ozawa
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.