Building block

Details Building block Building block

2006-06-20

2006-06-20

Legesse, Nini F. (Department: 3711)

Amusement devices: toys

Construction toy

Interfitting elements

C446S120000, C446S128000, C273S156000, C273S15700R

Reexamination Certificate

active

07063587

ABSTRACT:
A building block includes two perpendicularly connected square frames, and a hypotenuse frame extended between outer edges of the two square frames. Each of the square and hypotenuse frames has an outer frame portion and an inner cross-shaped rib portion having a thickness twice as large as that of the outer frame portion. The cross-shaped rib portion divides a space enclosed in each frame into four equal divisions, which are four cavities on one of the two square frames; two diagonally opposite round connecting posts and two diagonally opposite cavities on the other square frame; and two diagonally opposite connecting protrusions and two diagonally opposite rectangular cavities on the hypotenuse frame, so that a plurality of the building blocks could be assembled together in different manners to form changeful shapes via engagement of the cavities with corresponding connecting posts or protrusions.

REFERENCES:
patent: 4377916 (1983-03-01), Komiya
patent: 4392323 (1983-07-01), Rubik
patent: 4484406 (1984-11-01), Matsumoto et al.
patent: 6034821 (2000-03-01), Schenfeld et al.
patent: 6679780 (2004-01-01), Shih

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