Referenced by|
| US4522404 | Jun 14, 1984 | Jun 11, 1985 | | Subdivided block components reassemblable into three dimensional figures | | US4573683 | Nov 30, 1984 | Mar 4, 1986 | | Educational puzzle cube | | US4753622 | Oct 5, 1987 | Jun 28, 1988 | | Building block kit | | USD638683 | Sep 11, 2009 | May 31, 2011 | Alpha Corporation | Door handle for automobile |
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