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Roll-tight tarp system
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Patent number 4,691,957
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Issue date Sep 8, 1987
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Frontier, Inc.
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Hartley Ellingson
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B60 - VEHICLES IN GENERAL
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Vacuum grain moving apparatus
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Patent number 4,344,723
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Issue date Aug 17, 1982
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Frontier, Inc.
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Hartley Ellingson
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Swingable transport bar
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Patent number 4,162,085
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Issue date Jul 24, 1979
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Frontier, Inc.
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Thomas D. Miranowski
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B60 - VEHICLES IN GENERAL