US D278883 S
Abstract available in
FIG. 1 is a top plan view of a reversible friction-ring washer, showing my new design;
FIG. 2 is a side-elevational view taken from the bottom of FIG. 1;
FIG. 3 is a side-elevational view taken from the right of FIG. 1;
FIG. 4 is a bottom plan view thereof.