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                        Mixing equipment
                    
                                            
                                - 
                                    Patent number 4,408,886
                                
 
                                - 
                                    Issue date Oct 11, 1983
                                
 
                        
                                            
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                                    Coal Industry (Patents) Limited
                                 
                                - 
                                        
                                    John D. Sampson
                                 
                        
                                            
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3812076
                    
                                            
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                                    Patent number 3,812,076
                                
 
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                                    Issue date May 21, 1974
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3767170
                    
                                            
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                                    Patent number 3,767,170
                                
 
                                - 
                                    Issue date Oct 23, 1973
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3762691
                    
                                            
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                                    Patent number 3,762,691
                                
 
                                - 
                                    Issue date Oct 2, 1973
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3625487
                    
                                            
                                - 
                                    Patent number 3,625,487
                                
 
                                - 
                                    Issue date Dec 7, 1971
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3370890
                    
                                            
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                                    Patent number 3,370,890
                                
 
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                                    Issue date Feb 27, 1968
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3289396
                    
                                            
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                                    Patent number 3,289,396
                                
 
                                - 
                                    Issue date Dec 6, 1966
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3251583
                    
                                            
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                                    Patent number 3,251,583
                                
 
                                - 
                                    Issue date May 17, 1966
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3236422
                    
                                            
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                                    Patent number 3,236,422
                                
 
                                - 
                                    Issue date Feb 22, 1966
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3224813
                    
                                            
                                - 
                                    Patent number 3,224,813
                                
 
                                - 
                                    Issue date Dec 21, 1965
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3104782
                    
                                            
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                                    Patent number 3,104,782
                                
 
                                - 
                                    Issue date Sep 24, 1963
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3104030
                    
                                            
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                                    Patent number 3,104,030
                                
 
                                - 
                                    Issue date Sep 17, 1963
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        3001829
                    
                                            
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                                    Patent number 3,001,829
                                
 
                                - 
                                    Issue date Sep 26, 1961
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        2802698
                    
                                            
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                                    Patent number 2,802,698
                                
 
                                - 
                                    Issue date Aug 13, 1957
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        2785018
                    
                                            
                                - 
                                    Patent number 2,785,018
                                
 
                                - 
                                    Issue date Mar 12, 1957
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE
                                 
                        
                 
             
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                        2732107
                    
                                            
                                - 
                                    Patent number 2,732,107
                                
 
                                - 
                                    Issue date Jan 24, 1956
                                
 
                        
                                                                
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                                    B28 - WORKING CEMENT, CLAY, OR STONE