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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'WELSH') AND (first_name = 'Dwight F.') ORDER BY date ASC, patent, type

Total of 1 patents found where: Last Name is 'WELSH'; First Name is 'Dwight F.';

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T / S Patent Date Description Patentee Category Assigned To
 1872
U 123,958 February 20, 1872 Improvement in Lightning Rods
Lightning rod made of sheet metal crimped multiple times and curved to a circle to form a hollow rod with multiple deep flutes		 WELSH, Dwight F.
 Lightning Rod  

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