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Method of making a piston
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Patent number 4,997,024
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Issue date Mar 5, 1991
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T&N Technology Limited
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Andrew T. Cole
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B22 - CASTING POWDER METALLURGY
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Pistons
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Patent number 4,702,151
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Issue date Oct 27, 1987
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AE PLC
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Robert Munro
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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Reinforced pistons
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Patent number 4,679,493
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Issue date Jul 14, 1987
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AE PLC
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Robert Munro
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B22 - CASTING POWDER METALLURGY
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Pistons
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Patent number 4,586,553
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Issue date May 6, 1986
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AE PLC
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Gordon L. Allen
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B22 - CASTING POWDER METALLURGY