FIG. 1 is a front perspective view of a tissue fastening instrument according to the invention.

FIG. 2 is a right side view of the tissue fastening instrument of FIG. 1.

FIG. 3 is a top view of the tissue fastening instrument of FIG. 1.

FIG. 4 is a bottom view of the tissue fastening instrument of FIG. 1.

FIG. 5 is a front view of the tissue fastening instrument of FIG. 1.

FIG. 6 is a rear view of the tissue fastening instrument of FIG. 1; and,

FIG. 7 is a left side view of the tissue fastening instrument of FIG. 1.

The broken lines showing portions of a tissue fastening instrument are included for the purpose of illustrating environmental structure and form no part of the claimed design.