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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 = '315') AND (category.subclass = '55') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '315'; Subclass is '55';

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T / S Patent Date Description Patentee Category Assigned To
 1908
U 883,303 March 31, 1908 Security Lightning Arrester
Lightning rod with multiple separate points arranged along the conductor on the edges of the roof		 DRAKE, William E.
 Lightning Rod Point  

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