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Step for escalator
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Patent number 6,978,876
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Issue date Dec 27, 2005
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Otis Elevator Company
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Yoshio Tsukahara
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B66 - HOISTING LIFTING HAULING
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Elevator roller guide
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Patent number 5,632,358
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Issue date May 27, 1997
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Otis Elevator Company
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Koichi Maeda
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B66 - HOISTING LIFTING HAULING
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Papermaking method
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Patent number 4,952,279
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Issue date Aug 28, 1990
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Nissan Chemical Industries Ltd.
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Hisao Ikeda
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Papermaking method
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Patent number 4,840,705
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Issue date Jun 20, 1989
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Nissan Chemical Industries Ltd.
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Hisao Ikeda
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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