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			 The ornamental design for a air pump, as shown. 
			  
			  
			  
			  
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FIG. 1 is a perspective view showing my new design.
FIG. 2 is a front view thereof.
FIG. 3 is a rear view thereof.
FIG. 4 is a left end view thereof.
FIG. 5 is a right end view thereof.
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
| Patent | Priority | Assignee | Title | 
| D588612, | Jul 24 2008 | Black & Decker Inc | Hand portable air compressor | 
| D699266, | Feb 27 2013 | Ningbo Haosheng Pneumatic Machinery Co., Ltd. | Mini air compressor which is used in cosmetology | 
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