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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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3662815
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Patent number 3,662,815
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Issue date May 16, 1972
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B22 - CASTING POWDER METALLURGY
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3612154
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Patent number 3,612,154
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Issue date Oct 12, 1971
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B22 - CASTING POWDER METALLURGY
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3612162
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Patent number 3,612,162
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Issue date Oct 12, 1971
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B22 - CASTING POWDER METALLURGY
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3587720
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Patent number 3,587,720
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Issue date Jun 28, 1971
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B22 - CASTING POWDER METALLURGY
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3509938
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Patent number 3,509,938
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Issue date May 5, 1970
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B22 - CASTING POWDER METALLURGY
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3499479
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Patent number 3,499,479
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Issue date Mar 10, 1970
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B22 - CASTING POWDER METALLURGY
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3452713
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Patent number 3,452,713
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Issue date Jul 1, 1969
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B22 - CASTING POWDER METALLURGY
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3412785
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Patent number 3,412,785
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Issue date Nov 26, 1968
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B22 - CASTING POWDER METALLURGY
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3197827
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Patent number 3,197,827
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Issue date Aug 3, 1965
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B22 - CASTING POWDER METALLURGY
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3168765
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Patent number 3,168,765
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Issue date Feb 9, 1965
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B22 - CASTING POWDER METALLURGY
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3149393
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Patent number 3,149,393
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Issue date Sep 22, 1964
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B22 - CASTING POWDER METALLURGY
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3135028
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Patent number 3,135,028
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Issue date Jun 2, 1964
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B22 - CASTING POWDER METALLURGY
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3091009
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Patent number 3,091,009
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Issue date May 28, 1963
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B22 - CASTING POWDER METALLURGY
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3074130
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Patent number 3,074,130
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Issue date Jan 22, 1963
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B22 - CASTING POWDER METALLURGY
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3067472
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Patent number 3,067,472
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Issue date Dec 11, 1962
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B22 - CASTING POWDER METALLURGY
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3040398
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Patent number 3,040,398
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Issue date Jun 26, 1962
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B22 - CASTING POWDER METALLURGY
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3004314
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Patent number 3,004,314
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Issue date Oct 17, 1961
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B22 - CASTING POWDER METALLURGY
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3001253
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Patent number 3,001,253
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Issue date Sep 26, 1961
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B22 - CASTING POWDER METALLURGY
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2854710
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Patent number 2,854,710
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Issue date Oct 7, 1958
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B22 - CASTING POWDER METALLURGY
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2824348
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Patent number 2,824,348
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Issue date Feb 25, 1958
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B22 - CASTING POWDER METALLURGY