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Sand core breaking apparatus
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Patent number 6,425,436
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Issue date Jul 30, 2002
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AMSTED Industries Incorporated
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Robert G. Peting
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B22 - CASTING POWDER METALLURGY
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Pipe core clean out system
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Patent number 6,397,923
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Issue date Jun 4, 2002
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AMSTED Industries Incorporated
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Robert G. Peting
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B22 - CASTING POWDER METALLURGY
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Restrained pipe joint
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Patent number 5,037,144
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Issue date Aug 6, 1991
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AMSTED Industries Incorporated
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Robert G. Peting
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Boltless restrained pipe joint
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Patent number 4,552,385
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Issue date Nov 12, 1985
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AMSTED Industries Incorporated
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Robert G. Peting
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Restrained mechanical pipe joint
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Patent number 4,506,919
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Issue date Mar 26, 1985
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AMSTED Industries Incorporated
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Robert G. Peting
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...