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Tube slotter
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Issue date Sep 12, 1978
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Advanced Drainage Systems, Inc.
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Logan L. Dreibelbis
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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3910713
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3901113
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Patent number 3,901,113
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Issue date Aug 26, 1975
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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3877831
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3779285
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Issue date Dec 18, 1973
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3717058
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Patent number 3,717,058
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3635111
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3620115
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Patent number 3,620,115
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2753001
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B26 - HAND CUTTING TOOLS CUTTING SEVERING
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2683208
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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B26 - HAND CUTTING TOOLS CUTTING SEVERING