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Clamp for flexible duct
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Patent number 4,010,518
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Issue date Mar 8, 1977
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The Wiremold Company
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William E. Rejeski
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Floating mandrel duct making apparatus
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Patent number 3,962,019
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Issue date Jun 8, 1976
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The Wiremold Company
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William E. Rejeski
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Machine for manufacturing insulated duct
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Patent number 3,950,213
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Issue date Apr 13, 1976
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The Wiremold Company
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William E. Rejeski
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL