|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 date ASC, patent, 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|
|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.
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