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                        Thermal protector for electric motors
                    
                                            
                                - 
                                    Patent number 6,005,471
                                
 
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                                    Issue date Dec 21, 1999
                                
 
                        
                                            
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                                    Ubukata Industries Co., Ltd.
                                 
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                                    Isao  Higashikata
                                 
                        
                                            
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                                    H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
                                 
                        
                 
             
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                        Bimetal
                    
                                            
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                                    Patent number 5,573,860
                                
 
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                                    Issue date Nov 12, 1996
                                
 
                        
                                            
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                                    Sumitomo Special Metals Co., Ltd.
                                 
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                                    Kenji  Hirano
                                 
                        
                                            
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                                    B32 - LAYERED PRODUCTS
                                 
                        
                 
             
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                        Thermostat metal
                    
                                            
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                                    Patent number 4,217,398
                                
 
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                                    Issue date Aug 12, 1980
                                
 
                        
                                            
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                                    Texas Instruments Incorporated
                                 
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                                    Henry  Ty
                                 
                        
                                            
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                                    B32 - LAYERED PRODUCTS
                                 
                        
                 
             
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                        3748888
                    
                                            
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                                    Patent number 3,748,888
                                
 
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                                    Issue date Jul 31, 1973
                                
 
                        
                                                                
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                                    B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
                                 
                        
                 
             
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                        3739643
                    
                                            
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                                    Patent number 3,739,643
                                
 
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                                    Issue date Jun 19, 1973
                                
 
                        
                                                                
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                                    H01 - BASIC ELECTRIC ELEMENTS
                                 
                        
                 
             
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                        3646591
                    
                                            
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                                    Patent number 3,646,591
                                
 
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                                    Issue date Feb 29, 1972
                                
 
                        
                                                                
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                                    B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
                                 
                        
                 
             
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                        3491323
                    
                                            
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                                    Patent number 3,491,323
                                
 
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                                    Issue date Jan 20, 1970
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        3479732
                    
                                            
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                                    Patent number 3,479,732
                                
 
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                                    Issue date Nov 25, 1969
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        3453888
                    
                                            
                                - 
                                    Patent number 3,453,888
                                
 
                                - 
                                    Issue date Jul 8, 1969
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING