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This version for the blind was created by adding tacks of different sizes.
- Inventor: Unknown
- Mechanism: 4x4x4
- Patents: Unknown
- Producer: Unknown
- Year: 1982
- Original Price: $0.00 USD
- Current Price: No Data
This variant of the 4x4x4 was made accessible for the blind by adding differently sized tacks. This modification was done customly by an association for the blind unlike the 3x3x3 for the blind which came with differently shaped tiles.
Thank you to the following people for their assistance in helping collect the information on this page: Carter, Geert Hellings.
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