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Elevator testing apparatus
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Patent number 5,027,299
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Issue date Jun 25, 1991
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Mitsubishi Denki Kabushiki Kaisha
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Kenichi Uetani
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B66 - HOISTING LIFTING HAULING
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Supervisory system for elevators
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Patent number 4,802,082
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Issue date Jan 31, 1989
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Mitsubishi Denki Kabushiki Kaisha
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Kenichi Uetani
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B66 - HOISTING LIFTING HAULING
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Signal transmission system
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Patent number 4,682,342
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Issue date Jul 21, 1987
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Mitsubishi Denki Kabushiki Kaisha
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Kenichi Uetani
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Elevator supervision system
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Patent number 4,553,639
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Issue date Nov 19, 1985
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Mitsubishi Denki Kabushiki Kaisha
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Kenichi Uetani
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B66 - HOISTING LIFTING HAULING
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Elevator control system
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Patent number 4,531,616
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Issue date Jul 30, 1985
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Mitsubishi Denki Kabushiki Kaisha
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Kenichi Uetani
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B66 - HOISTING LIFTING HAULING
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