On this day: April 10

Published On: Apr 08 2013 10:21:02 AM CDT   Updated On: Apr 10 2014 01:00:00 AM CDT

The first Arbor Day is celebrated, the Titanic sets sail, "The Great Gatsby" is published, Paul McCartney quits The Beatles, and the U.S. and China engage in "ping-pong diplomacy," all on this day.

OTD April 10 - safety pin
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U.S. Patent Office

1849: American mechanic Walter Hunt patents the safety pin. Needing $15 to pay back a friend, he sold the patent to W. R. Grace and Company for $400. The company went on to make millions from Hunt's invention.

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