Granted Patent
Utility
US 5,053,085 · App. 07/345,677
High strength, heat-resistant aluminum-based alloys
Inventors:
Tsuyoshi Masumoto, Akihisa Inoe, Katsumasa Odera, Masahiro Oguchi
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Apr 28, 1989
Inventors
Tsuyoshi Masumoto
Akihisa Inoe
Katsumasa Odera
Masahiro Oguchi
Assignees (at issue)
Yoshida Kogyo K.K.
Piston Ring Company, Ltd.
Tsuyoshi Masumoto
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.