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Stepped, segmented, closed-die forging
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Patent number 5,950,481
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Issue date Sep 14, 1999
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Wyman-Gordon Company, Inc.
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John M. Sarkisian
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Stepped, segmented, closed-die forging
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Patent number 5,868,026
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Issue date Feb 9, 1999
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Wyman-Gordon Company
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John M. Sarkisian
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Stepped segmented, closed-die forging
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Patent number 5,592,847
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Issue date Jan 14, 1997
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Wyman-Gordon Company
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John M. Sarkisian
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...