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The ornamental design for alarm system tester, as shown and described. |
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FIG. 1 is a top front perspective view of an alarm system tester showing our new design, with the cover in an open position;
FIG. 2 is a bottom and left rear perspective view thereof with the cover closed;
FIG. 3 is a top plan view thereof, with the cover closed;
FIG. 4 is a rear elevational view thereof, with the cover closed;
FIG. 5 is a left side elevational view thereof with the cover closed.
Zephir, Henry K., Wilson, Winthrop E.
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