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                        Tail rotor assembly
                    
                                            
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                                    Patent number 11,148,796
                                
 
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                                    Issue date Oct 19, 2021
                                
 
                        
                                            
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                                    Textron Innovations Inc.
                                 
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                                    Albert Gerard Brand
                                 
                        
                                            
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        Helicopter control system
                    
                                            
                                - 
                                    Patent number 4,768,737
                                
 
                                - 
                                    Issue date Sep 6, 1988
                                
 
                        
                                            
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                                    PBSystems, Inc.
                                 
                                - 
                                        
                                    William D. Broadley
                                 
                        
                                            
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        Helicopters
                    
                                            
                                - 
                                    Patent number 4,347,997
                                
 
                                - 
                                    Issue date Sep 7, 1982
                                
 
                        
                                            
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                                    Westland Aircraft Limited
                                 
                                - 
                                        
                                    Geoffrey M. Byham
                                 
                        
                                            
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2788075
                    
                                            
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                                    Patent number 2,788,075
                                
 
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                                    Issue date Apr 9, 1957
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2702084
                    
                                            
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                                    Patent number 2,702,084
                                
 
                                - 
                                    Issue date Feb 15, 1955
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2672939
                    
                                            
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                                    Patent number 2,672,939
                                
 
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                                    Issue date Mar 23, 1954
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2613748
                    
                                            
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                                    Patent number 2,613,748
                                
 
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                                    Issue date Oct 14, 1952
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2604949
                    
                                            
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                                    Patent number 2,604,949
                                
 
                                - 
                                    Issue date Jul 29, 1952
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2496624
                    
                                            
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                                    Patent number 2,496,624
                                
 
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                                    Issue date Feb 7, 1950
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS
                                 
                        
                 
             
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                        2420784
                    
                                            
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                                    Patent number 2,420,784
                                
 
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                                    Issue date May 20, 1947
                                
 
                        
                                                                
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                                    B64 - AIRCRAFT AVIATION COSMONAUTICS