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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 = '72') AND (category.subclass = '178') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '72'; Subclass is '178';

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T / S Patent Date Description Patentee Category Assigned To
 1870
U 107,051 September 6, 1870 Improvement in Machines for Making Tubular Lightning Conductors
Machine for making corrugated lightning rods out of sheet metal		 HOUSEL, Benjamin F.
THAYER, Simeon O.
 Lightning Rod Machine  

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