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The ornamental design for a chair frame, substantially as shown and described. |
FIG. 1 is a front perspective view of a chair frame showing my design;
FIG. 2 is a side elevational view, the undisclosed side being a mirror image thereof;
FIG. 3 is a top plan view;
FIG. 4 is a front elevational view; and
FIG. 5 is a rear elevational view thereof.
The support surface disclosed by means of broken lines in the figures is shown for illustrative purposes only.
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