May 202017
 

Levi Strauss and Jacob Davis received a patent in 1873 for denim jeans with copper rivets. Strauss and Davis made heavy-duty pants for hard-working miners in California and Nevada.

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Oct 132017
 

Garret A. Morgan patented a device for breathing in 1914 that would make mining safer. He received patent number 1,113,675.

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