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Electromagnet control system
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Patent number 5,467,243
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Issue date Nov 14, 1995
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Otis Elevator Company
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Clement A. Skalski
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Elevator ride quality
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Patent number 5,329,077
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Issue date Jul 12, 1994
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Otis Elevator Company
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Clement A. Skalski
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B66 - HOISTING LIFTING HAULING
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Elevator cab guidance assembly
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Patent number 5,117,946
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Issue date Jun 2, 1992
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Otis Elevator Company
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Boris G. Traktovenko
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B66 - HOISTING LIFTING HAULING
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Elevator speed control
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Patent number 4,527,662
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Issue date Jul 9, 1985
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Otis Elevator Company
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John C. Doane
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B66 - HOISTING LIFTING HAULING