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Glass-lined pipes
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Patent number 4,702,884
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Issue date Oct 27, 1987
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The United States of America as represented by the Secretary of the Navy
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David Goldstein
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B22 - CASTING POWDER METALLURGY
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Self-sealing fluid die
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Patent number 4,656,002
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Issue date Apr 7, 1987
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ROC-Tec, Inc.
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James R. Lizenby
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B22 - CASTING POWDER METALLURGY
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3622313
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Patent number 3,622,313
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Issue date Nov 23, 1971
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B22 - CASTING POWDER METALLURGY
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3469976
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Patent number 3,469,976
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Issue date Sep 30, 1969
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B22 - CASTING POWDER METALLURGY