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                        Liquefied natural gas production
                    
                                            
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                                    Patent number 8,584,488
                                
 
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                                    Issue date Nov 19, 2013
                                
 
                        
                                            
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                                    Ortloff Engineers, Ltd.
                                 
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                                    John D. Wilkinson
                                 
                        
                                            
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                                    F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
                                 
                        
                 
             
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                        3846993
                    
                                            
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                                    Patent number 3,846,993
                                
 
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                                    Issue date Nov 12, 1974
                                
 
                        
                                                                
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                                    F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
                                 
                        
                 
             
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                        3002362
                    
                                            
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                                    Patent number 3,002,362
                                
 
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                                    Issue date Oct 3, 1961
                                
 
                        
                                                                
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                                    F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...