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                        Non-contact speed encoder
                    
                                            
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                                    Patent number 11,525,805
                                
 
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                                    Issue date Dec 13, 2022
                                
 
                        
                                            
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                                    Olympus NDT Canada Inc.
                                 
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                                    Rémi  Leclerc
                                 
                        
                                            
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        3443212
                    
                                            
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                                    Patent number 3,443,212
                                
 
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                                    Issue date May 6, 1969
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        3345563
                    
                                            
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                                    Patent number 3,345,563
                                
 
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                                    Issue date Oct 3, 1967
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        3278839
                    
                                            
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                                    Patent number 3,278,839
                                
 
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                                    Issue date Oct 11, 1966
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        3242425
                    
                                            
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                                    Patent number 3,242,425
                                
 
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                                    Issue date Mar 22, 1966
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        3189817
                    
                                            
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                                    Patent number 3,189,817
                                
 
                                - 
                                    Issue date Jun 15, 1965
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING