Granted Patent
Utility
US 4,990,198 · App. 07/398,993
High strength magnesium-based amorphous alloy
Inventors:
Tsuyoshi Masumoto, Akihisa Inoue, Katsumasa Odera
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Aug 28, 1989
Inventors
Tsuyoshi Masumoto
Akihisa Inoue
Katsumasa Odera
Assignee (at issue)
Yoshida Kogyo K.K.
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.