The Post-It note has been stuck to American office culture for 36 years, but remains one of the few American innovations still produced here. Invented by 3M (MMM - Get Report) employee Art Fry in 1974, the Post-it Note first hit stores as "Press 'n Peel" in 1977 before getting its soon-to-be genericized trademark in 1980. Though knockoff versions have been produced since 3M's patent expired in the 1990s, Post-It Notes themselves are still made at a plant in Cynthiana, Ky. As for 3M, the former Minnesota Mining and Manufacturing Company still calls Minnesota home.
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