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The ornamental design for portable heater device, substantially as shown and described. |
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FIG. 1 is a perspective view of the first embodiment of the heater device of this design.
FIG. 2 is a bottom plan view thereof.
FIG. 3 is a left side elevational view. The right side is a mirror image of FIG. 3.
FIG. 4 is a front view thereof.
FIG. 5 is a top plan view of this embodiment.
FIG. 6 is a left side elevational view of a second embodiment of this design. The right side is a mirror image.
FIG. 7 is a front elevational view thereof.
FIG. 8 is a top plan view of the second embodiment.
FIG. 9 is a rear perspective view of the second embodiment.
FIG. 10 is a bottom plan view of the second embodiment.
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