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The ornamental design for an air cleaner, as shown and described. |
FIG. 1 is a perspective view taken from the top, front and left side of an air cleaner showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevational view thereof, the left side being a mirror image of the right side shown; and
FIG. 4 is a rear elevational view thereof.
Madl, Alfred W., Kirschling, Charles J.
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