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                        Control pilot valve apparatus
                    
                                            
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                                    Patent number 9,249,896
                                
 
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                                    Issue date Feb 2, 2016
                                
 
                        
                                            
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                                    Cla-Val Co.
                                 
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                                    Robert  Folk
                                 
                        
                                            
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                                    F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
                                 
                        
                 
             
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                        Low pressure pilot valve
                    
                                            
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                                    Patent number 4,135,697
                                
 
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                                    Issue date Jan 23, 1979
                                
 
                        
                                            
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                                    Grove Valve and Regulator Company
                                 
                                - 
                                        
                                    Richard S. Brumm
                                 
                        
                                            
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        3882890
                    
                                            
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                                    Patent number 3,882,890
                                
 
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                                    Issue date May 13, 1975
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        3854495
                    
                                            
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                                    Patent number 3,854,495
                                
 
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                                    Issue date Dec 17, 1974
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        3814543
                    
                                            
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                                    Patent number 3,814,543
                                
 
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                                    Issue date Jun 4, 1974
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        3625247
                    
                                            
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                                    Patent number 3,625,247
                                
 
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                                    Issue date Dec 7, 1971
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        3219236
                    
                                            
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                                    Patent number 3,219,236
                                
 
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                                    Issue date Nov 23, 1965
                                
 
                        
                                                                
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                                    B67 - OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS LIQUID...
                                 
                        
                 
             
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                        3089510
                    
                                            
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                                    Patent number 3,089,510
                                
 
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                                    Issue date May 14, 1963
                                
 
                        
                                                                
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                                    F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
                                 
                        
                 
             
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                        2908158
                    
                                            
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                                    Patent number 2,908,158
                                
 
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                                    Issue date Oct 13, 1959
                                
 
                        
                                                                
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                                    G01 - MEASURING TESTING
                                 
                        
                 
             
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                        2868223
                    
                                            
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                                    Patent number 2,868,223
                                
 
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                                    Issue date Jan 13, 1959
                                
 
                        
                                                                
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                                    F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
                                 
                        
                 
             
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                        2781776
                    
                                            
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                                    Patent number 2,781,776
                                
 
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                                    Issue date Feb 19, 1957
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        2737975
                    
                                            
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                                    Patent number 2,737,975
                                
 
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                                    Issue date Mar 13, 1956
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        2735444
                    
                                            
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                                    Patent number 2,735,444
                                
 
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                                    Issue date Feb 21, 1956
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        2704551
                    
                                            
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                                    Patent number 2,704,551
                                
 
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                                    Issue date Mar 22, 1955
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        2633146
                    
                                            
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                                    Patent number 2,633,146
                                
 
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                                    Issue date Mar 31, 1953
                                
 
                        
                                                                
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                                    F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
                                 
                        
                 
             
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                        2614367
                    
                                            
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                                    Patent number 2,614,367
                                
 
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                                    Issue date Oct 21, 1952
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING
                                 
                        
                 
             
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                        2599956
                    
                                            
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                                    Patent number 2,599,956
                                
 
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                                    Issue date Jun 10, 1952
                                
 
                        
                                                                
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                                    G05 - CONTROLLING REGULATING