- 
                
                
            
- 
                
                
            
- 
                
                
                    
                        Double-decker rail vehicle
                                - 
                                    Patent number 11,180,167
                                
- 
                                    Issue date Nov 23, 2021
                                
 
                                - 
                                         CRRC Qingdao Sifang Co., Ltd. CRRC Qingdao Sifang Co., Ltd.
- 
                                         Xiaojun  Deng Xiaojun  Deng
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
            
- 
                
                
            
- 
                
                
            
- 
                
                
            
- 
                
                
            
- 
                
                
            
- 
                
                
                    
                        3044419
                                - 
                                    Patent number 3,044,419
                                
- 
                                    Issue date Jul 17, 1962
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2884873
                                - 
                                    Patent number 2,884,873
                                
- 
                                    Issue date May 5, 1959
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2808787
                                - 
                                    Patent number 2,808,787
                                
- 
                                    Issue date Oct 8, 1957
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2743683
                                - 
                                    Patent number 2,743,683
                                
- 
                                    Issue date May 1, 1956
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2724347
                                - 
                                    Patent number 2,724,347
                                
- 
                                    Issue date Nov 22, 1955
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2681016
                                - 
                                    Patent number 2,681,016
                                
- 
                                    Issue date Jun 15, 1954
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2619044
                                - 
                                    Patent number 2,619,044
                                
- 
                                    Issue date Nov 25, 1952
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2612121
                                - 
                                    Patent number 2,612,121
                                
- 
                                    Issue date Sep 30, 1952
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2609760
                                - 
                                    Patent number 2,609,760
                                
- 
                                    Issue date Sep 9, 1952
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2599606
                                - 
                                    Patent number 2,599,606
                                
- 
                                    Issue date Jun 10, 1952
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2590045
                                - 
                                    Patent number 2,590,045
                                
- 
                                    Issue date Mar 18, 1952
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2570837
                                - 
                                    Patent number 2,570,837
                                
- 
                                    Issue date Oct 9, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2567894
                                - 
                                    Patent number 2,567,894
                                
- 
                                    Issue date Sep 11, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2564909
                                - 
                                    Patent number 2,564,909
                                
- 
                                    Issue date Aug 21, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2564730
                                - 
                                    Patent number 2,564,730
                                
- 
                                    Issue date Aug 21, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2564731
                                - 
                                    Patent number 2,564,731
                                
- 
                                    Issue date Aug 21, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2564732
                                - 
                                    Patent number 2,564,732
                                
- 
                                    Issue date Aug 21, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2561630
                                - 
                                    Patent number 2,561,630
                                
- 
                                    Issue date Jul 24, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2561653
                                - 
                                    Patent number 2,561,653
                                
- 
                                    Issue date Jul 24, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2556140
                                - 
                                    Patent number 2,556,140
                                
- 
                                    Issue date Jun 5, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS
 
 
- 
                
                
                    
                        2548006
                                - 
                                    Patent number 2,548,006
                                
- 
                                    Issue date Apr 10, 1951
                                
 
                                - 
                                         B61 - RAILWAYS B61 - RAILWAYS