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Imaginary pivot lift crane
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Patent number 4,449,635
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Issue date May 22, 1984
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The Manitowoc Company, Inc.
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Percy R. Helm
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B66 - HOISTING LIFTING HAULING
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Lift crane support system
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Patent number 4,195,740
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Issue date Apr 1, 1980
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The Manitowoc Company, Inc.
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Daniel E. Beduhn
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B66 - HOISTING LIFTING HAULING
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Ring supported tower crane
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Patent number 4,194,638
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Issue date Mar 25, 1980
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The Manitowoc Company, Inc.
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James G. Morrow
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B66 - HOISTING LIFTING HAULING
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Hoist drum drive control
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Patent number 4,136,855
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Issue date Jan 30, 1979
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The Manitowoc Company Inc.
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James G. Morrow
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B66 - HOISTING LIFTING HAULING
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Self-propelled drive mechanism
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Patent number 4,069,884
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Issue date Jan 24, 1978
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The Manitowoc Company, Inc.
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James G. Morrow
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B66 - HOISTING LIFTING HAULING
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Sea crane tiedown
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Patent number 4,011,955
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Issue date Mar 15, 1977
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The Manitowoc Company, Inc.
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James G. Morrow
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B66 - HOISTING LIFTING HAULING
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Power lowering system
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Patent number 3,988,008
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Issue date Oct 26, 1976
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The Manitowoc Company, Inc.
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James G. Morrow
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B66 - HOISTING LIFTING HAULING
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Rotational drive assembly
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Patent number 3,954,020
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Issue date May 4, 1976
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The Manitowoc Company, Inc.
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John D. West
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B66 - HOISTING LIFTING HAULING