Granted Patent
Utility
US 4,911,767 · App. 07/324,467
Corrosion-resistant aluminum-based alloys
Inventors:
Tsuyoshi Masumoto, Akihisa Inoue, Katsumasa Odera
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Mar 16, 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.