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Hoist
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Patent number 6,631,816
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Issue date Oct 14, 2003
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Ishikawajima-Harima Jukogyo Kabushiki Kaisha
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Isao Miyazawa
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B66 - HOISTING LIFTING HAULING
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Differential drive
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Patent number 5,269,728
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Issue date Dec 14, 1993
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Power Kinetics, Inc.
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William E. Rogers
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B66 - HOISTING LIFTING HAULING
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Balanced lifting beam
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Patent number 3,976,202
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Issue date Aug 24, 1976
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Rene Bauvin
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B66 - HOISTING LIFTING HAULING
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3570684
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Patent number 3,570,684
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Issue date Mar 16, 1971
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B66 - HOISTING LIFTING HAULING
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3249236
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Patent number 3,249,236
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Issue date May 3, 1966
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B66 - HOISTING LIFTING HAULING
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2675291
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Patent number 2,675,291
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Issue date Apr 13, 1954
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B66 - HOISTING LIFTING HAULING
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1557965
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Patent number 1,557,965
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Issue date Oct 20, 1925
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B66 - HOISTING LIFTING HAULING
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1446313
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Patent number 1,446,313
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Issue date Feb 20, 1923
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B66 - HOISTING LIFTING HAULING
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1375908
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Patent number 1,375,908
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Issue date Apr 26, 1921
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B66 - HOISTING LIFTING HAULING