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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '16') AND (category.subclass = 'DIG40') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '16'; Subclass is 'DIG40';

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T / S Patent Date Description Patentee Category Assigned To
 1887
U 362,064 May 3, 1887 Lightning Rod
Lightning rod with holes in the upper end and lower end to allow air to to draft through		 DANIELS, Eugene Ora
 Lightning Rod  

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