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                        3868600
                    
                                            
                                - 
                                    Patent number 3,868,600
                                
 
                                - 
                                    Issue date Feb 25, 1975
                                
 
                        
                                                                
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                                    H04 - ELECTRIC COMMUNICATION TECHNIQUE
                                 
                        
                 
             
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                        3718872
                    
                                            
                                - 
                                    Patent number 3,718,872
                                
 
                                - 
                                    Issue date Feb 27, 1973
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3582829
                    
                                            
                                - 
                                    Patent number 3,582,829
                                
 
                                - 
                                    Issue date Jun 1, 1971
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3312831
                    
                                            
                                - 
                                    Patent number 3,312,831
                                
 
                                - 
                                    Issue date Apr 4, 1967
                                
 
                        
                                                                
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                                    H04 - ELECTRIC COMMUNICATION TECHNIQUE
                                 
                        
                 
             
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                        3289185
                    
                                            
                                - 
                                    Patent number 3,289,185
                                
 
                                - 
                                    Issue date Nov 29, 1966
                                
 
                        
                                                                
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                                    H04 - ELECTRIC COMMUNICATION TECHNIQUE
                                 
                        
                 
             
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                        3247470
                    
                                            
                                - 
                                    Patent number 3,247,470
                                
 
                                - 
                                    Issue date Apr 19, 1966
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3226657
                    
                                            
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                                    Patent number 3,226,657
                                
 
                                - 
                                    Issue date Dec 28, 1965
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3157848
                    
                                            
                                - 
                                    Patent number 3,157,848
                                
 
                                - 
                                    Issue date Nov 17, 1964
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3105212
                    
                                            
                                - 
                                    Patent number 3,105,212
                                
 
                                - 
                                    Issue date Sep 24, 1963
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3045220
                    
                                            
                                - 
                                    Patent number 3,045,220
                                
 
                                - 
                                    Issue date Jul 17, 1962
                                
 
                        
                                                                
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                                    G11 - INFORMATION STORAGE
                                 
                        
                 
             
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                        3040184
                    
                                            
                                - 
                                    Patent number 3,040,184
                                
 
                                - 
                                    Issue date Jun 19, 1962
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        3004171
                    
                                            
                                - 
                                    Patent number 3,004,171
                                
 
                                - 
                                    Issue date Oct 10, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2997667
                    
                                            
                                - 
                                    Patent number 2,997,667
                                
 
                                - 
                                    Issue date Aug 22, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2996682
                    
                                            
                                - 
                                    Patent number 2,996,682
                                
 
                                - 
                                    Issue date Aug 15, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2990521
                    
                                            
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                                    Patent number 2,990,521
                                
 
                                - 
                                    Issue date Jun 27, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2980868
                    
                                            
                                - 
                                    Patent number 2,980,868
                                
 
                                - 
                                    Issue date Apr 18, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2976478
                    
                                            
                                - 
                                    Patent number 2,976,478
                                
 
                                - 
                                    Issue date Mar 21, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2967949
                    
                                            
                                - 
                                    Patent number 2,967,949
                                
 
                                - 
                                    Issue date Jan 10, 1961
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2953739
                    
                                            
                                - 
                                    Patent number 2,953,739
                                
 
                                - 
                                    Issue date Sep 20, 1960
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2934718
                    
                                            
                                - 
                                    Patent number 2,934,718
                                
 
                                - 
                                    Issue date Apr 26, 1960
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2920264
                    
                                            
                                - 
                                    Patent number 2,920,264
                                
 
                                - 
                                    Issue date Jan 5, 1960
                                
 
                        
                                                                
                                - 
                                        
                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        2920290
                    
                                            
                                - 
                                    Patent number 2,920,290
                                
 
                                - 
                                    Issue date Jan 5, 1960
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2884599
                    
                                            
                                - 
                                    Patent number 2,884,599
                                
 
                                - 
                                    Issue date Apr 28, 1959
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2876419
                    
                                            
                                - 
                                    Patent number 2,876,419
                                
 
                                - 
                                    Issue date Mar 3, 1959
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2875412
                    
                                            
                                - 
                                    Patent number 2,875,412
                                
 
                                - 
                                    Issue date Feb 24, 1959
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2870416
                    
                                            
                                - 
                                    Patent number 2,870,416
                                
 
                                - 
                                    Issue date Jan 20, 1959
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2870415
                    
                                            
                                - 
                                    Patent number 2,870,415
                                
 
                                - 
                                    Issue date Jan 20, 1959
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY
                                 
                        
                 
             
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                        2863124
                    
                                            
                                - 
                                    Patent number 2,863,124
                                
 
                                - 
                                    Issue date Dec 2, 1958
                                
 
                        
                                                                
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                                    H03 - BASIC ELECTRONIC CIRCUITRY