Granted Patent
Utility
US 4,457,984 · App. 06/343,932
Carbon artificial prosthetic material
Inventors:
Sugio Otani, Sadakatsu Yanagisawa, Kunio Niijima
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Jan 29, 1982
Inventors
Sugio Otani
Sadakatsu Yanagisawa
Kunio Niijima
Assignees (at issue)
Mitsubishi Chemical Industries, Ltd.
Sugio Otani
Sadakatsu Yanagisawa
Kunio Niijima
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.