Claims (1)
Claim 1 (Independent)
The ornamental design for a seatback frame, as shown and described.
Full Description
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FIG. 1 is a front view of the seatback frame;
FIG. 2 is a rear view of the seatback frame;
FIG. 3 is a left view of the seatback frame;
FIG. 4 is a right view of the seatback frame;
FIG. 5 is a top view of the seatback frame;
FIG. 6 is a bottom view of the seatback frame; and,
FIG. 7 is a perspective view of the seatback frame.