FIG. 1 is a front elevation of a knee joint for prosthesis showing my new design;
FIG. 2 is a rear elevation thereof;
FIG. 3 is a left side elevation thereof
FIG. 4 is a right side elevation thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom perspective view thereof; and,
FIG. 7 is a top and front perspective view thereof.
The broken line showing of portions of the design is for illustrative purpose only and form no part of the claimed design.