No one had patented it before that date, therefore, he's accredited with inventing it.
http://www.bbc.co.uk/ahistoryofthewo...Ryyc2fOqSjKiLw
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No one had patented it before that date, therefore, he's accredited with inventing it.
http://www.bbc.co.uk/ahistoryofthewo...Ryyc2fOqSjKiLw