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U.S. Patent No. 4,378,116 - issued to Ernö Rubik in 1983 for a "spatial logical toy" (files.mastodon.social)

submitted 9 months ago by design_law@mastodon.social to c/tails@lemmon.website

4 comments fedilink

Image description: utility patent drawings for the Rubik's cube

(Originally published earlier today on mastodon.social)

design_law

joined 2 years ago