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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 = '249') AND (category.subclass = '52') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '249'; Subclass is '52';

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T / S Patent Date Description Patentee Category Assigned To
 1877
U 191,103 May 22, 1877 Improvement in Molds for Glass Shades, &c.
Mold for lamp shades		 BROOKE, Homer
 Mold Bennett B. Schneider

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