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A fully functional lower-order cross cube made with four Rubik's 2x2x2s.
A fully functional lower-order cross cube made with four Rubik's 2x2x2s. This is equivalent to the Babyface cube although all pieces of this puzzle are unique.
Ibrahim Abu-Shumays and Mary Abu-Shumays were granted a patent under the number given here in 1986. It was subsequently forgotten.
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