Cassette storage unit
FIG. 1 is a perspective view from above of a cassette storage unit according to my design; 
     FIG. 2 is a horizontal section of the unit taken along the lines 2--2 of FIG. 1; 
     FIG. 3 is a plan view of the unit; 
     FIG. 4 is a front vertical section of the unit taken along the lines 4--4 of FIG. 3; 
     FIG. 5 is a front elevation of the unit; 
     FIG. 6 is a side elevation of the unit taken along the lines 7--7 of FIG. 5; and 
     FIG. 7 is a side vertical section of the unit.