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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 = '279') AND (category.subclass = '100') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '279'; Subclass is '100';

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T / S Patent Date Description Patentee Category Assigned To
 1889
U 406,681 July 9, 1889 Lightning Rod
Coupling with flat resilent spring between the sections		 WATTS, John Henry Charles
 Lightning Rod Coupling  

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