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3901305
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Patent number 3,901,305
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Issue date Aug 26, 1975
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B22 - CASTING POWDER METALLURGY
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3880221
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Patent number 3,880,221
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Issue date Apr 29, 1975
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B22 - CASTING POWDER METALLURGY
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3854932
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Patent number 3,854,932
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Issue date Dec 17, 1974
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C21 - METALLURGY OF IRON
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3606293
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Patent number 3,606,293
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Issue date Sep 20, 1971
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C21 - METALLURGY OF IRON
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3598383
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Patent number 3,598,383
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Issue date Aug 10, 1971
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C21 - METALLURGY OF IRON
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3508743
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Patent number 3,508,743
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Issue date Apr 28, 1970
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C21 - METALLURGY OF IRON
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3501291
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Patent number 3,501,291
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Issue date Mar 17, 1970
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B22 - CASTING POWDER METALLURGY
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3492114
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Patent number 3,492,114
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Issue date Jan 27, 1970
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B22 - CASTING POWDER METALLURGY
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3418109
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Patent number 3,418,109
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Issue date Dec 24, 1968
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C21 - METALLURGY OF IRON
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3402756
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Patent number 3,402,756
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Issue date Sep 24, 1968
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B22 - CASTING POWDER METALLURGY
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3380509
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Patent number 3,380,509
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Issue date Apr 30, 1968
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C21 - METALLURGY OF IRON
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3352465
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Patent number 3,352,465
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Issue date Nov 14, 1967
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B22 - CASTING POWDER METALLURGY
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3342250
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Patent number 3,342,250
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Issue date Sep 19, 1967
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B22 - CASTING POWDER METALLURGY
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3291596
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Patent number 3,291,596
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B22 - CASTING POWDER METALLURGY
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2997384
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Patent number 2,997,384
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Issue date Aug 22, 1961
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C21 - METALLURGY OF IRON
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2997386
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Patent number 2,997,386
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C21 - METALLURGY OF IRON
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2936326
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Patent number 2,936,326
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C21 - METALLURGY OF IRON
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2781260
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Patent number 2,781,260
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Issue date Feb 12, 1957
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C21 - METALLURGY OF IRON