FIG. 1 is a rear perspective view of an interbody fusion device showing my new design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a left side elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a front elevation thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawings are included for purposes of illustration and form no part of the claimed design.