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Coupling sleeve
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Patent number 4,082,319
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Issue date Apr 4, 1978
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Berger Industries, Inc.
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Sidney Berger
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Joint for conduit
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Patent number 4,050,722
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Issue date Sep 27, 1977
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Berger Industries, Inc.
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Sidney Berger
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Light walled conduit
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Patent number 4,047,743
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Issue date Sep 13, 1977
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Berger Industries, Inc.
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Burton L. Weintraub
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Conduit joint
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Patent number 4,005,879
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Issue date Feb 1, 1977
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Berger Industries, Inc.
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Sidney Berger
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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