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| | Safety Pin
The safety pin was invented by Walter Hunt in 1849. He patented the safety pin on April 10, 1849 (patent No. 6,281). Hunt's pin was made by twisting a length of wire. He invented the safety pin in order to pay a debt of $15, he eventually sold the rights to his patent for $400.  
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| Science & Engineering Encyclopaedia Version 2.4 © 2001-2010 Dirac Delta Consultants Limited | ||||||
A simple pin that clips shut most commonly used to fasten two pieces of fabric.