Granted Patent
Utility
US 4,511,293 · App. 06/454,100
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Inventors:
Hiroshi Shimomura, Tatsuo Arai
Patented Case
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Granted: Apr 16, 1985
Filed: Dec 28, 1982
Inventors
Hiroshi Shimomura
Tatsuo Arai
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.