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3891024
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Patent number 3,891,024
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Issue date Jun 24, 1975
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B22 - CASTING POWDER METALLURGY
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3758913
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Patent number 3,758,913
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Issue date Sep 18, 1973
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B22 - CASTING POWDER METALLURGY
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3653425
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Patent number 3,653,425
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Issue date Apr 4, 1972
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B22 - CASTING POWDER METALLURGY
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2705353
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Patent number 2,705,353
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Issue date Apr 5, 1955
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B22 - CASTING POWDER METALLURGY