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			 The ornamental design for a key chain, as shown and described. 
			  
			  
			  
			  
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FIG. 1 is a perspective view of an embodiment of a key chain.
FIG. 2 is a first side view of the embodiment of FIG. 1.
FIG. 3 is a top view of the embodiment of FIG. 1.
FIG. 4 is a bottom view of the embodiment of FIG. 1; and,
FIG. 5 is a second side view of the embodiment of FIG. 1.
It being understood that the broken lines are for exemplary illustrative purposes only and form no part of the claimed design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Nov 04 2004 | On Track Innovations, Ltd. | (assignment on the face of the patent) | / | |||
| Dec 14 2004 | RIMON, AVNER | ON TRACK INNOVATIONS LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016154 | /0351 | |
| May 26 2019 | ON TRACK INNOVATIONS LTD | BANK LEUMI LE-ISRAEL B M | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 051114 | /0206 | 
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