| 2020 | Invention | Rotary shaft assembly. The present invention provides a rotary shaft assembly applied to a novel ... | 
				    			
				    				
				    					|  | Invention | Clutch system interlocking with accelerator and brake pedal. The present invention provides a new... | 
				    			
				    				
				    					|  | Invention | Clutch assembly structure. The clutch assembly of the clutch system according to the present inve... | 
				    			
				    				
				    					|  | Invention | Power transmission device interlocking with accelerator and brake pedal. According to the present... | 
				    			
				    				
				    					|  | Invention | Rotary shaft assembly having novel structure. The present invention provides a rotary shaft assem... | 
				    			
				    				
				    					|  | Invention | Clutch assembly with novel structure. A clutch assembly of a clutch system according to the prese... | 
				    			
				    				
				    					|  | Invention | Accelerator and brake linking power transmission mechanism. A power transmission mechanism of a c... |