Trailer Frame

FIG. 1 is a top perspective view of a trailer frame, showing my new design; FIG. 2 is a bottom perspective view thereof; FIG. 3 is a folded state view thereof; FIG. 4 is a front view thereof; FIG. 5 is a rear view thereof; FIG. 6 is a left side view thereof; FIG. 7 is a right side view thereof; FIG. 8 is a top view thereof; and, FIG. 9 is a bottom view. The broken lines in the drawings illustrate the portions of the trailer frame, which form no part of the claimed design.