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                        Rotary friction welding
                    
                                            
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                                    Patent number 9,791,075
                                
 
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                                    Issue date Oct 17, 2017
                                
 
                        
                                            
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                                    Rolls-Royce PLC
                                 
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                                    Simon Edward Bray
                                 
                        
                                            
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3900148
                    
                                            
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                                    Patent number 3,900,148
                                
 
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                                    Issue date Aug 19, 1975
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3604101
                    
                                            
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                                    Patent number 3,604,101
                                
 
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                                    Issue date Sep 14, 1971
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3433384
                    
                                            
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                                    Patent number 3,433,384
                                
 
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                                    Issue date Mar 18, 1969
                                
 
                        
                                                                
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                                    F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
                                 
                        
                 
             
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                        3042428
                    
                                            
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                                    Patent number 3,042,428
                                
 
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                                    Issue date Jul 3, 1962
                                
 
                        
                                                                
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                                    B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
                                 
                        
                 
             
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                        2957236
                    
                                            
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                                    Patent number 2,957,236
                                
 
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                                    Issue date Oct 25, 1960
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        2939348
                    
                                            
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                                    Patent number 2,939,348
                                
 
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                                    Issue date Jun 7, 1960
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR