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                        Flexural pivot
                    
                                            
                                - 
                                    Patent number 10,443,649
                                
 
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                                    Issue date Oct 15, 2019
                                
 
                        
                                            
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                                    Raytheon Company
                                 
                                - 
                                        
                                    Scott  Balaban
                                 
                        
                                            
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                        Fluted electrochemical machining
                    
                                            
                                - 
                                    Patent number 6,413,407
                                
 
                                - 
                                    Issue date Jul 2, 2002
                                
 
                        
                                            
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                                    Lehr Precision, Inc.
                                 
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                                    Norbert Anthony Bruns
                                 
                        
                                            
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                        Electric discharge machine
                    
                                            
                                - 
                                    Patent number 6,091,041
                                
 
                                - 
                                    Issue date Jul 18, 2000
                                
 
                        
                                            
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                                    Ton-Shih  Lai
                                 
                        
                                            
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                        Electrochemical machining
                    
                                            
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                                    Patent number 6,007,694
                                
 
                                - 
                                    Issue date Dec 28, 1999
                                
 
                        
                                            
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                                    Phillips Plastics Corporation
                                 
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                                    Dave  Walsh
                                 
                        
                                            
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                        Piston-slide-valve
                    
                                            
                                - 
                                    Patent number 5,329,841
                                
 
                                - 
                                    Issue date Jul 19, 1994
                                
 
                        
                                            
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                                    Hydraulik-Ring GmbH
                                 
                                - 
                                        
                                    Axel  Sauer
                                 
                        
                                            
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                        3554892
                    
                                            
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                                    Patent number 3,554,892
                                
 
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                                    Issue date Jan 12, 1971
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3506557
                    
                                            
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                                    Patent number 3,506,557
                                
 
                                - 
                                    Issue date Apr 14, 1970
                                
 
                        
                                                                
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                        3429798
                    
                                            
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                                    Patent number 3,429,798
                                
 
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                                    Issue date Feb 25, 1969
                                
 
                        
                                                                
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                        3324022
                    
                                            
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                                    Patent number 3,324,022
                                
 
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                                    Issue date Jun 6, 1967
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3305470
                    
                                            
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                                    Patent number 3,305,470
                                
 
                                - 
                                    Issue date Feb 21, 1967
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3224953
                    
                                            
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                                    Patent number 3,224,953
                                
 
                                - 
                                    Issue date Dec 21, 1965
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR