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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 = '52') AND (category.subclass = '651.11') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '52'; Subclass is '651.11';

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T / S Patent Date Description Patentee Category Assigned To
 1890
U 433,459 August 5, 1890 Lightning Rod Tower
Lightning rod tower used to protect a group of houses or buildings		 FERRELL, Isaac M.
 Lightning Rod  

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