Patent of the Week: Spatial Logical Toy (Rubik's Cube)
Set of 2 Rubik's Cube Patent Prints, Digital Download, (8 jpeg files) – The Patent Planet
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Rubik's Cube Patent 1983 - Blue Jigsaw Puzzle by Stephen Younts - Pixels Puzzles
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Jan. 30, 1975: Rubik Applies for Patent on Magic Cube | WIRED
Rubiks Cube Patent from 1983 - Vintage Art Print by Aged Pixel - Fine Art America
Rubik's Cube Patent 1 Photograph by Andrew Fare - Pixels
rubik's cube Patent 1983 #2 Photograph by Chris Smith - Fine Art America
Rubik's Cube Patent by Zapista Zapista
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