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3545531
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B22 - CASTING POWDER METALLURGY
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3401739
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B66 - HOISTING LIFTING HAULING
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3052935
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B22 - CASTING POWDER METALLURGY
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3045300
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Patent number 3,045,300
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B22 - CASTING POWDER METALLURGY
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2820264
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B22 - CASTING POWDER METALLURGY
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2641806
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B22 - CASTING POWDER METALLURGY
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B22 - CASTING POWDER METALLURGY
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1897696
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1352026
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B22 - CASTING POWDER METALLURGY
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B22 - CASTING POWDER METALLURGY
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906359
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B22 - CASTING POWDER METALLURGY
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801136
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B22 - CASTING POWDER METALLURGY
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B22 - CASTING POWDER METALLURGY
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683368
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B22 - CASTING POWDER METALLURGY
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641502
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B22 - CASTING POWDER METALLURGY
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628473
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B22 - CASTING POWDER METALLURGY
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526094
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480432
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439829
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B22 - CASTING POWDER METALLURGY
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439828
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Patent number 439,828
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B22 - CASTING POWDER METALLURGY