Briefcase cover
FIG. 1 is a front perspective view of a briefcase cover showing my new design; 
     FIG. 2 is a front perspective view of a briefcase cover in a folded position; 
     FIG. 3 is a front elevational view thereof; 
     FIG. 4 is a rear elevational view thereof; 
     FIG. 5 is a top plan view thereof; 
     FIG. 6 is an end elevational view thereof; 
     FIG. 7 is an opposite end elevational view thereof; and, 
     FIG. 8 is a bottom plan view thereof. 
     The broken line showing of the handle in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.