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			 The ornamental design for the digital voltage indicator, as shown and described. 
			  
			  
			  
			  
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FIG. 1 is a perspective view of the digital voltage indicator showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a side elevational view of the one side thereof;
FIG. 5 is a side elevational view of the other side thereof
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Feb 21 2005 | BUCHANAN, JAMES S | HD Electric Company | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016331 | /0975 | |
| Feb 24 2005 | HD Electric Company | (assignment on the face of the patent) | / | 
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