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Utility reel
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Patent number 4,471,919
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Issue date Sep 18, 1984
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Crellin, Inc.
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Carl V. Leunig
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Constant tension device for filter bag
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Patent number 4,400,186
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Issue date Aug 23, 1983
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Albany International Corporation
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Carl V. Leunig
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Constant tensioning device
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Patent number 4,389,228
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Issue date Jun 21, 1983
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Albany International Corp.
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Carl V. Leunig
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL