Patent ID: 8715030
Filing Date: 2014-05-06
Classification: A63H

Abstract:
1. A toy building block being a hollow rectangular structure and comprising: a top board including multiple rectangular protrusions extending from an outer surface thereof and each protrusion having four sideboards and each sideboard including multiple ribs extending from an inner surface thereof; an open bottom; and four holding spaces and each holding space formed between two adjacent ribs of two adjacent sideboards and corresponding to a size of the positioning post of the protrusion; wherein each sideboard has multiple pairs of the ribs and a space between the ribs of each pair corresponds to a width of the recess of the protrusion so that when one protrusion of another toy building block engages the open bottom of the toy building block, two pairs of the ribs on two adjacent sideboards of the toy building block respectively engage two of the recesses of the protrusion of the another toy building block to make the two toy building blocks unrotatably engaged.