US D420062 S
FIG. 1 is a top perspective view of single stud construction toy block according to the invention;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof; and,
FIG. 5 is an end elevational view thereof, the opposite end elevational view and the front and back elevational views thereof being identical.