Patent ID: 8905812

Claim:
A toy block comprising: a body made of a plastic material and having four sidewalls; a plurality of studs at a top side; a plurality of recessed portions at a bottom side; a plurality of bottom posts at the bottom side, wherein the plurality of bottom posts is surrounded by the plurality of recessed portions and ready to abut an engaged stud of a mating toy block; a plurality of semi-circular posts at the bottom side, wherein the plurality of semi-circular posts protrude from the four sidewalls and ready to abut the engaged Stud of the mating toy block; a plurality of rib pairs connecting between two of the plurality of bottom posts, or between the plurality of bottom posts and the plurality of semi-circular posts, wherein the plurality of rib pairs have either a flat wall or a protrusion on rib exteriors thereof in a corresponding recessed portion and ready to abut the engaged stud of the mating toy block; a plurality of edge stoppers in the plurality of recessed portions at an inner side of the four sidewalls and ready to abut the engaged Stud of the mating toy block; and a plurality of corner stoppers in the plurality of recessed portions, at four corners of the inner side of the four sidewalls, and aligned towards a center of a nearest bottom post respectively and ready to abut the engaged stud of the mating toy block.