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3907550
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Patent number 3,907,550
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Issue date Sep 23, 1975
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C30 - CRYSTAL GROWTH
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3904378
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Patent number 3,904,378
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Issue date Sep 9, 1975
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B22 - CASTING POWDER METALLURGY
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3819145
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Patent number 3,819,145
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Issue date Jun 25, 1974
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B22 - CASTING POWDER METALLURGY
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3807485
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Patent number 3,807,485
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Issue date Apr 30, 1974
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B22 - CASTING POWDER METALLURGY
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3743005
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Patent number 3,743,005
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Issue date Jul 3, 1973
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3695337
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Patent number 3,695,337
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Issue date Oct 3, 1972
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B22 - CASTING POWDER METALLURGY
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3669179
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Patent number 3,669,179
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Issue date Jun 13, 1972
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B22 - CASTING POWDER METALLURGY