January 26 Patent of the Day

On January 26, 1965, Noah McVicker and Joseph McVicker received U.S. Patent No. 3,167,440 on Plastic Modeling Composition of a Soft, Pliable Working Consistency, know to millions of children as Play-Doh.  The product was based upon a wall paper cleaner that had be repurposed as a modeling compound.


Billions of cans of Play-Doh have been sold, and it can be found in more than 6,000 stores in the U.S., and in at least 75 countries around the world.