Door Jamb

FIG. 1 is a perspective view of a door jamb showing the new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a back elevation thereof; FIG. 4 is a right-side elevation view thereof; FIG. 5 is a left-side elevation view thereof; FIG. 6 is a top plan view thereof; and, FIG. 7 is a bottom plan view thereof. The broken lines are for the purpose of illustrating the unclaimed portions of the article and form no part of the claimed design.