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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 = '403') AND (category.subclass = '398') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '403'; Subclass is '398';

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T / S Patent Date Description Patentee Category Assigned To
 1867
U 61,741 February 5, 1867 Improvement in Lightning Rods
Lightning rod made from an iron rod with grooves and strips of copper slid into the grooves to make ribs		 JILLSON, Clark
 Lightning Rod  

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