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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 = '36') AND (category.subclass = '22R') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '36'; Subclass is '22R';

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T / S Patent Date Description Patentee Category Assigned To
 1925
U 1,538,946 May 26, 1925 Lightning Rod Connector
Lightning rod with Y-shaped connector pressed out of sheet metal, folded in half around the conductor, and halves secured together by bending over the metal tabs		 MOORE, Ira M.
 Lightning Rod  

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