The ornamental design for an upper limb prosthesis, as shown and described.
FIG. 1 is a front perspective view of an upper limb prosthesis showing our new design;
FIG. 2 is another front perspective view thereof;
FIG. 3 is a top perspective view thereof shown on a slightly reduced scale;
FIG. 4 is a side perspective view thereof;
FIG. 5 is a bottom perspective view thereof;
FIG. 6 is a side perspective view thereof of the side opposite that shown in FIG. 4; and,
FIG. 7 is a rear perspective view thereof shown on an enlarged scale.
The broken lines shows shown in the figures are included for the purpose of illustrating structural environment and form no part of the claimed design.