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The ornamental design for a wattmeter, as shown. |
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FIG. 1 is a top, front, and right side elevational view of a wattmeter showing my new design;
FIG. 2 is a top plan view;
FIG. 3 is a rear elevational view;
FIG. 4 is a left side elevational view;
FIG. 5 is a right side elevational view;
FIG. 6 is a front elevational view; and
FIG. 7 is a bottom plan view thereof.
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| D909219, | Jun 12 2019 | Measuring instrument for high-voltage technology |
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