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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 = '138') AND (category.subclass = '109') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '138'; Subclass is '109';

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T / S Patent Date Description Patentee Category Assigned To
 1876
U 175,022 March 21, 1876 Improvement in Lamp Collars
Oil lamp collar		 BROWN, George W.
 HU The Bristol Brass and Clock Co.

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