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Molten metal supply device
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Patent number 5,700,422
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Issue date Dec 23, 1997
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Ryobi Ltd.
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Hirotake Usui
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B22 - CASTING POWDER METALLURGY
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3591052
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Patent number 3,591,052
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Issue date Jul 6, 1971
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B22 - CASTING POWDER METALLURGY
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3142599
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Patent number 3,142,599
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Issue date Jul 28, 1964
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1776544
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Patent number 1,776,544
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Issue date Sep 23, 1930
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B22 - CASTING POWDER METALLURGY