Granted Patent
Utility
US 4,645,384 · App. 06/860,794
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Inventors:
Hiroshi Shimomura, Katsuyoshi Karino, Kazuo Iizuka
Patented Case
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Granted: Feb 24, 1987
Filed: May 8, 1986
Inventors
Hiroshi Shimomura
Katsuyoshi Karino
Kazuo Iizuka
Assignee (at issue)
Mitsubishi Kinzoku Kabushiki Kaisha
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.