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The ornamental design for a portable door lock, as shown and described. |
FIG. 1 is a front, top and right end perspective view of a portable door lock showing my new design, the portion of the figure shown in broken lines representing a door jamb and forming no part of the claimed design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a right end elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a left end elevational view thereof; and,
FIG. 6 is a bottom plan view thereof, the top plan view being a mirror image.
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