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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 = '174') AND (category.subclass = '131A') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '174'; Subclass is '131A';

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T / S Patent Date Description Patentee Category Assigned To
 1910
U 974,396 November 1, 1910 Lightning Rod
Lightning conductor composed of a water-retaining fibrous cored covered by a helical winding with a braided wire covering		 KRESS, Edward J.
 Lightning Rod William M. Leatherman

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