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                        Metallurgical furnace
                    
                                            
                                - 
                                    Patent number 9,915,476
                                
 
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                                    Issue date Mar 13, 2018
                                
 
                        
                                            
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                                    9282-3087 QUEBEC INC.
                                 
                                - 
                                        
                                    John  Chao
                                 
                        
                                            
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                                    F27 - FURNACES KILNS OVENS RETORTS
                                 
                        
                 
             
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                        DC Arc furnace component
                    
                                            
                                - 
                                    Patent number 4,435,813
                                
 
                                - 
                                    Issue date Mar 6, 1984
                                
 
                        
                                            
                                - 
                                        
                                    Asea Aktiebolag
                                 
                                - 
                                        
                                    Sven-Einar  Stenkvist
                                 
                        
                                            
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                                    C21 - METALLURGY OF IRON
                                 
                        
                 
             
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                        Lining unit
                    
                                            
                                - 
                                    Patent number 4,376,808
                                
 
                                - 
                                    Issue date Mar 15, 1983
                                
 
                        
                                            
                                - 
                                        
                                    Vladimir D. Kudinov
                                 
                        
                                            
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                                    F27 - FURNACES KILNS OVENS RETORTS
                                 
                        
                 
             
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                        Fire brick unit
                    
                                            
                                - 
                                    Patent number 4,148,165
                                
 
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                                    Issue date Apr 10, 1979
                                
 
                        
                                            
                                - 
                                        
                                    Kyushu Taikarenga Kabushiki Kaisha
                                 
                                - 
                                        
                                    Akira  Watanabe
                                 
                        
                                            
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                                    F27 - FURNACES KILNS OVENS RETORTS
                                 
                        
                 
             
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                        3832478
                    
                                            
                                - 
                                    Patent number 3,832,478
                                
 
                                - 
                                    Issue date Aug 27, 1974
                                
 
                        
                                                                
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                                    F27 - FURNACES KILNS OVENS RETORTS
                                 
                        
                 
             
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                        3808764
                    
                                            
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                                    Patent number 3,808,764
                                
 
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                                    Issue date May 7, 1974
                                
 
                        
                                                                
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                                    F27 - FURNACES KILNS OVENS RETORTS
                                 
                        
                 
             
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                        3781962
                    
                                            
                                - 
                                    Patent number 3,781,962
                                
 
                                - 
                                    Issue date Jan 1, 1974
                                
 
                        
                                                                
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                                    F27 - FURNACES KILNS OVENS RETORTS
                                 
                        
                 
             
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                        3698068
                    
                                            
                                - 
                                    Patent number 3,698,068
                                
 
                                - 
                                    Issue date Oct 17, 1972
                                
 
                        
                                                                
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                                    F27 - FURNACES KILNS OVENS RETORTS