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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 = '144.3') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '15'; Subclass is '144.3';

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T / S Patent Date Description Patentee Category Assigned To
 1873
U 145,641 December 16, 1873 Improvement in Couplings for Tubular Lightning Rods
Means of coupling tubular lightning rods		 FRITSCH, Joseph W.
 Lightning Rod  

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