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                        3048903
                                - 
                                    Patent number 3,048,903
                                
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                                    Issue date Aug 14, 1962
                                
 
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                                         B22 - CASTING POWDER METALLURGY B22 - CASTING POWDER METALLURGY
 
 
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                        2920361
                                - 
                                    Patent number 2,920,361
                                
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                                    Issue date Jan 12, 1960
                                
 
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                                         B22 - CASTING POWDER METALLURGY B22 - CASTING POWDER METALLURGY
 
 
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                        2649630
                                - 
                                    Patent number 2,649,630
                                
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                                    Issue date Aug 25, 1953
                                
 
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                                         B22 - CASTING POWDER METALLURGY B22 - CASTING POWDER METALLURGY
 
 
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                        2610373
                                - 
                                    Patent number 2,610,373
                                
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                                    Issue date Sep 16, 1952
                                
 
                                - 
                                         B22 - CASTING POWDER METALLURGY B22 - CASTING POWDER METALLURGY
 
 
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                        1929777
                                - 
                                    Patent number 1,929,777
                                
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                                    Issue date Oct 10, 1933
                                
 
                                - 
                                         B22 - CASTING POWDER METALLURGY B22 - CASTING POWDER METALLURGY
 
 
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                        1332938
                                - 
                                    Patent number 1,332,938
                                
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                                    Issue date Mar 9, 1920
                                
 
                                - 
                                         B22 - CASTING POWDER METALLURGY B22 - CASTING POWDER METALLURGY