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3915852
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Patent number 3,915,852
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Issue date Oct 28, 1975
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B22 - CASTING POWDER METALLURGY
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3894721
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Patent number 3,894,721
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Issue date Jul 15, 1975
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B22 - CASTING POWDER METALLURGY
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3871623
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Patent number 3,871,623
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Issue date Mar 18, 1975
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B22 - CASTING POWDER METALLURGY
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3863847
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Patent number 3,863,847
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Issue date Feb 4, 1975
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B22 - CASTING POWDER METALLURGY
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3762656
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Patent number 3,762,656
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Issue date Oct 2, 1973
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B22 - CASTING POWDER METALLURGY
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3712593
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Patent number 3,712,593
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Issue date Jan 23, 1973
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B22 - CASTING POWDER METALLURGY
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3425670
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Patent number 3,425,670
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Issue date Feb 4, 1969
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B22 - CASTING POWDER METALLURGY
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2095385
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Patent number 2,095,385
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Issue date Oct 12, 1937
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B22 - CASTING POWDER METALLURGY
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1791582
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Patent number 1,791,582
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Issue date Feb 10, 1931
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B22 - CASTING POWDER METALLURGY