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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 = '439') AND (category.subclass = '571') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '439'; Subclass is '571';

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T / S Patent Date Description Patentee Category Assigned To
 1935
U 2,016,470 October 8, 1935 Secondary Rack and the Process of Making Same
Simple secondary rack construction to reduce cost.		 WHITE, Leonard H.
 Bracket/secondary Rack Line Material Co.

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