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Free fall disconnect
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Patent number 6,244,449
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Issue date Jun 12, 2001
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Manitowoc Crane Group, Inc.
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David J. Pech
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B66 - HOISTING LIFTING HAULING
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Mechanical track drive
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Patent number 6,158,535
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Issue date Dec 12, 2000
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Manitowoc Crane Group, Inc.
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Kenneth J. Porubcansky
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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Swing lock mechanism
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Patent number 6,010,018
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Issue date Jan 4, 2000
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Manitowoc Crane Group, Inc.
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David J. Pech
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B66 - HOISTING LIFTING HAULING
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