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                        Materials handling and treatment
                    
                                            
                                - 
                                    Patent number 9,381,454
                                
 
                                - 
                                    Issue date Jul 5, 2016
                                
 
                        
                                            
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                                    Z-Filter (Pty) Ltd
                                 
                                - 
                                        
                                    Neil Deryck Bray Graham
                                 
                        
                                            
                                - 
                                        
                                    B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
                                 
                        
                 
             
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                        Electroosmotic dewaterer
                    
                                            
                                - 
                                    Patent number 5,192,413
                                
 
                                - 
                                    Issue date Mar 9, 1993
                                
 
                        
                                            
                                - 
                                        
                                    Fuji Electric Co., Ltd.
                                 
                                - 
                                        
                                    Mikimasa  Yamaguchi
                                 
                        
                                            
                                - 
                                        
                                    C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
                                 
                        
                 
             
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                        2094863
                    
                                            
                                - 
                                    Patent number 2,094,863
                                
 
                                - 
                                    Issue date Oct 5, 1937
                                
 
                        
                                                                
                                - 
                                        
                                    B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL