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The ornamental design for a dual telephone base, as shown and described. |
FIG. 1 is a perspective view of a dual telephone base, showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear elevational view thereof; and,
FIG. 4 is an elevational view from the left side thereof.
The bottom surface, not shown, is plain and unornamented.
The broken line showing of a telephone handset and keypad in FIG. 1 and of a keypad of FIG. 2 is for illustrative purposes only and forms no part of the claimed design.
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