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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 = '49') AND (category.subclass = '342') ORDER BY patent DESC, type

Total of 1 patents found where: Class is '49'; Subclass is '342';

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T / S Patent Date Description Patentee Category Assigned To
 1877
U 198,471 December 25, 1877 Improvement in Lightning Rods
Lightning rod composed of sheet metal formed into a pair of tubes with rod laying between the tubes and multiple tubes and rods can be used
SMITH, Charles H.
Lightning Rod  

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