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Seismic isolator
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Patent number 4,599,834
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Issue date Jul 15, 1986
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Kabushiki Kaisha Toshiba
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Shigeru Fujimoto
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Earthquake isolation floor
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Patent number 4,402,483
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Issue date Sep 6, 1983
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Mitsubishi Steel Mfg. Co., Ltd.
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Hiroshi Kurabayashi
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Earthquake isolation floor
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Patent number 4,371,143
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Issue date Feb 1, 1983
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Mitsubishi Steel Mfg. Co., Ltd.
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Jiro Ishida
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...