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					| Patent    D923572 |  
					| Priority Nov 22 2020 |  
					| Filed Nov 22 2020 |  
					| Issued Jun 29 2021 |  
					| Expiry Jun 29 2036 |  
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					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 4 |  
					 | 8 |  
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			  The ornamental design for a stirling engine, as shown and described. | 
 
	
FIG. 1 is a front, top perspective view of the stirling engine showing my new design;
FIG. 2 is a rear, top perspective view thereof;
FIG. 3 is a front, bottom perspective view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a right side elevational view thereof;
FIG. 8 is a top plan view thereof; and,
FIG. 9 is a bottom plan view thereof.
	
	Zhang, Yi
	
	
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
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	 | 8793992, | Jul 28 2008 | MUFG UNION BANK, N A | Thermoelectric device for use with Stirling engine | 
    
	 | 20030167766, |  |  |  | 
    
	 | 20080295684, |  |  |  | 
    
	 | 20090272111, |  |  |  | 
    
	 | 20110107757, |  |  |  | 
    
	 | D904303, | Jul 01 2019 | CHAN, TAT MING | Stirling engine | 
    
	 | D906244, | Feb 20 2019 |  | Stirling engine | 
	
	
	
	  
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