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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 = '22R') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '174'; Subclass is '22R';

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T / S Patent Date Description Patentee Category Assigned To
 1871
U 120,251 October 24, 1871 Improvement in Lightning Rod Couplings
Lightning rods with interconnecting couplings		 DEMOREST, David W.
 Lightning Rod Coupling  

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