The ornamental design for a medicalinstrument handle, as shown and described.
FIG. 1 is a right side elevational view of a medical instrument handle according to the present invention;
FIG. 2 is a left side elevational view of the medical instrument handle of FIG. 1;
FIG. 3 is a top perspective view of the medical instrument handle of FIG. 1;
FIG. 4 is a bottom perspective view of the medical instrument handle of FIG. 1;
FIG. 5 is a front perspective view of the medical instrument handle of FIG. 1; and,
FIG. 6 is a rear perspective view of the medical instrument handle of FIG. 1.
The dot dash broken lines and the evenly spaced broken lines that are immediately adjacent to the claim, represent the bounds of the claim, while all other evenly spaced broken lines are directed to environment; the broken lines form no part of the claimed design.