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Vacuum moulding flask
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Patent number 4,567,932
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Issue date Feb 4, 1986
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M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft
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Horst Hollenbach
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B22 - CASTING POWDER METALLURGY
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3513905
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Patent number 3,513,905
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Issue date May 26, 1970
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B22 - CASTING POWDER METALLURGY
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3429360
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Patent number 3,429,360
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Issue date Feb 25, 1969
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B22 - CASTING POWDER METALLURGY
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3396045
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Patent number 3,396,045
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Issue date Aug 6, 1968
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B22 - CASTING POWDER METALLURGY
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3010165
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Patent number 3,010,165
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Issue date Nov 28, 1961
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B22 - CASTING POWDER METALLURGY
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2997755
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Patent number 2,997,755
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Issue date Aug 29, 1961
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B22 - CASTING POWDER METALLURGY
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2876535
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Patent number 2,876,535
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Issue date Mar 10, 1959
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B22 - CASTING POWDER METALLURGY
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2665461
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Patent number 2,665,461
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Issue date Jan 12, 1954
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B22 - CASTING POWDER METALLURGY