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Pipeline safety joint
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Patent number 4,826,214
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Issue date May 2, 1989
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James Howden & Company Ltd.
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Harold Ratcliffe
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Coal burner
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Patent number 4,621,582
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Issue date Nov 11, 1986
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James Howden & Company Ltd.
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James Cooper
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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Wind turbines
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Patent number 4,575,309
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Issue date Mar 11, 1986
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James Howden & Company Ltd.
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Allan W. Brown
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...