| 
                                                        Title: | 
                                                    
                                                        1870 Ads-Campbell, Whittier & Co., Steam Engines | 
                                                 
                                                
                                                    | 
                                                        Source: | 
                                                    
                                                        Boston Directory, V56, 1870, pgs. 721-722 | 
                                                 
                                                
                                                    | 
                                                        Insert Date: | 
                                                    
                                                        5/11/2023 10:45:44 PM | 
                                                 
                                             
                                             
                                            
                                                
                                                
                                                    
                                                        US Patent: 35,176
  https://datamp.org/patents/displayPatent.php?number=35176&typeCode=0 | 
                                                 
                                             
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                                                            1870 Campbell, Whittier & Co., Steam Engine
                                                            
                                                         
                                                        
                                                             
                                                             
                                                            
                                                            1870 Campbell, Whittier & Co., Rider's Patent  Steam Engines
                                                            
                                                         
                                                        
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