Granted Patent
Utility
US 5,015,308 · App. 07/378,169
Corrosion-resistant and heat-resistant amorphous aluminum-based alloy thin film and process for producing the same
Inventor:
Hiroshi Yamagata
Patented Case
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Granted: May 14, 1991
Filed: Jul 11, 1989
Inventor
Hiroshi Yamagata
Assignees (at issue)
Tsuyoshi Masumoto
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.