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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 = '173') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '403'; Subclass is '173';

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T / S Patent Date Description Patentee Category Assigned To
 1868
U 78,459 June 2, 1868 Improvement in Lightning Rods
Means of connecting tubular lightning rods and supporting with rubber brackets		 KIRTLAND, George
 Lightning Rod Coupling S. Smith
 1871
U 119,323 September 26, 1871 Improvement in Lightning Rod Connections
Lightning rod coupling using a round metal disk with radial threaded holes		 CODINGTON, Ayres
 Lightning Rod Coupling  

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