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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 = '15') AND (category.subclass = '173') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '15'; Subclass is '173';

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T / S Patent Date Description Patentee Category Assigned To
 1869
U 90,578 May 25, 1869 Improvement in Lightning Rod Couplings
Coupling for lightning rods where the ends can be screwed together (see reissue 8,304)		 REYBURN, William S.
HUNTER, Edmund A. W.
 Lightning Rod Coupling  

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