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Elevator control system
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Patent number 5,663,538
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Issue date Sep 2, 1997
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Masami Sakita
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B66 - HOISTING LIFTING HAULING
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Elevator system
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Patent number 4,046,227
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Issue date Sep 6, 1977
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Westinghouse Electric Corporation
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Andrew F. Kirsch
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B66 - HOISTING LIFTING HAULING
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Elevator system
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Patent number 4,037,688
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Issue date Jul 26, 1977
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Westinghouse Electric Corporation
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Charles L. Winkler
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B66 - HOISTING LIFTING HAULING
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3614997
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Patent number 3,614,997
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Issue date Oct 26, 1971
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B66 - HOISTING LIFTING HAULING
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2290714
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Patent number 2,290,714
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Issue date Jul 21, 1942
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B66 - HOISTING LIFTING HAULING