US D406336 S
FIG. 1 is a perspective view of the top and side of a drip chamber with outer axial ribs for infusion or transfusion medical lines showing our new design;
FIG. 2 is a side elevational view showing one of the ribs, the other ribbed sides being identical;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a bottom plan view thereof.