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The Number of Patents Filed World Wide Annually, the First Patent Approved by the U.S. Government, and the Length of Time U.S. Salt Manufacturer Samuel Winslow Was Granted a Patent for Salt Manufacturing Technology

As of 2015, approximately 2,600,000 (2.6 million) patents are filed worldwide per year with less than half being approved in the US. The first patent ever approved by the US patent office was for salt in 1641. The Massachusetts General Court granted Samuel Winslow a 10 year patent for his novel method of making salt...


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