The ornamental design for a paddedknee brace, as shown and described.
FIG. 1 is a perspective view showing a padded knee brace showing the new invention;
FIG. 2 is a perspective view showing the present invention in use;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a right side elevational view thereof.
The broken line showing of a woman in FIG. 2 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.